Publications
Peer-reviewed Journal Publications (click)
Journal Papers In Submission/Revision
[1] J. W. Leem et al., Multifunctional photogenic metamaterials (In preparation).
[2] C. Moon, J. W. Leem et al., Optical PUFs (In preparation).
[3] D. W. Kim†, J. Jang†, J. W. Leem† et al., Selective up- and down-conversion luminescence for optically-driven strong cryptographic primitives, (Submitted).
[4] S. Kwon, J. W. Leem et al., Spectral recovery in a photograph with a hyperspectral color chart (Submitted).
[5] S. M. Park, J. W. Leem et al., Color truthing with gamut learning for biophotography (In preparation).
[6] T. Park, J. W. Leem et al., Photonic Nanomaterials for Wearable Healthcare Devices (in preparation).
Peer-reviewed Journal Publications (1st/CP author: 55, co-author: 35)
2024
[90] J. Park†, J. W. Leem†, M. Park, J. O Kim, Z. Ku, W, Chegal, S. W. Kang, and Y. L. Kim, Heteronanostructured field-effect transistors for enhancing entropy and parameter space in electrical unclonable primitives, ACS Nano, 18(1), 1041-1053 (2024). PDF
[89] J. Kim, Y. Ji, D. L. Guo, Y. L. Kim, and J. W. Leem*, Bioinkjet printing and protein tagging of camouflaged biosafe quick response codes for medicine authentication, Advanced Materials Technologies, 9(3), 2301438 (2024). PDF
2023
[88] Y. Ji, S. M. Park, S. Kwon, J. W. Leem, V. V. Nair, Y. Tong, and Y. L. Kim, mHealth hyperspectral learning for instantaneous spatiospectral imaging of hemodynamics, PNAS Nexus, 2(4), pgad111 (2023). PDF
2022
[87] J. W. Leem, H. J. Jeon, Y. Ji, S. M. Park, Y. Kwak, J. Park, K. Y. Kim, S. W. Kim, and Y. L. Kim, Edible matrix code with photogenic silk proteins, ACS Central Science 8(5), 513–526 (2022) [Cover Art]. PDF
[86] H. J. Jeon†, J. W. Leem†, Y. Ji, S. M. Park, J. Park, K. Y. Kim, S. W. Kim, and Y. L. Kim, Cyber-physical watermarking with inkjet edible bioprinting, Advanced Functional Materials 32(18), 2112479 (2022). PDF
[85] M. S. Kim, G. J. Lee, J. W. Leem, S. H. Choi, Y. L. Kim, and Y. M. Song, Revisiting silk: a lens-free optical physical unclonable function, Nature Communications 13, 247 (2022). PDF
[84] W. Park, Van P. Nguyen, Y. Jeon, B. Kim, Y. Li, J. Yi, H. Kim, J. W. Leem, Y. L. Kim, D. R. Kim, Y. M. Paulus, C. H. Lee, Biodegradable silicon nanoneedles for ocular drug delivery, Science Advances 8(13), eabn1772 (2022). PDF
2021
[83] J. Park†, J. W. Leem†, Z. Ku, J. O, Kim, W. C. Chegal, S. W. Kang, and Y. L. Kim, Disordered heteronanostructures of MoS2 and TiO2 for unclonable cryptographic primitives, ACS Applied Nano Materials 4(2), 2076-2085 (2021). PDF
2020
[82] J. W. Leem†, A. E. L. Allcca†, Y. J. Kim, J. Park, S.-W. Kim, S.-R. Kim, W. Ryu, Y. P. Chen, and Y. L. Kim, Photoelectric silk via genetic encoding and bio-assisted plasmonics, Advanced Biosystems 4(7), 2000040 (2020). PDF
[81] J. W. Leem, M. J. Fraser, and Y. L. Kim, (Invited) Transgenic and diet-enhanced silk production for reinforced biomaterials: A metamaterial perspective, Annual Review of Biomedical Engineering 22, 79-102 (2020). PDF
[80] J. W. Leem, M. S. Kim, S. H. Choi, S. R. Kim, S. W. Kim, Y. M. Song, R. J. Young, and Y. L. Kim, Edible unclonable functions, Nature Communications 11(1), 328 (2020). PDF
[79] E. K. Lee, R. K. Baruah, J. W. Leem, W. Park, B. H. Kim, A. Urbas, Z. Ku, Y. L. Kim, M. A. Alam, and C. H, Lee, Fractal web design of a hemispherical photodetector array with organic‐dye‐sensitized graphene hybrid composites, Advanced Materials 32(46), 2004456 (2020). PDF
[78] B. Dudem, R. D. I. G. Dharmasena, S. A. Graham, J. W. Leem, H. Patnam, A. R. Mule, S. R. P. Silva, and J. S. Yu, Exploring theoretical and experimental optimization towards high-performance triboelectric nanogenerators using microarchitecture silk cocoon films, Nano Energy 74, 104882 (2020). PDF
2018
[77] J. W. Leem, A. E. L. Allcca, J. Chen, S. W. Kim, K. Y. Kim, K. H. Choi, Y. P. Chen, S. R. Kim, and Y. L. Kim, Visible light biophotosensors using biliverdin from ‘Antheraea yamamai’, Optics Express 26(24), 31817-31828 (2018) [Editor's Pick]. PDF
[76] J. W. Leem, J. Park, S. W. Kim, S. R. Kim, S. H. Choi, K. H. Choi, and Y. L. Kim, Green-light-activated photoreaction via genetic hybridization of far-red fluorescent protein and silk, Adv. Science, 5(6), 1700863 (2018) [Cover Art]. PDF
[75] J. W. Leem, S. R. Kim, K. H. Choi, and Y. L. Kim, Plasmonic photocatalyst-like fluorescent proteins for generating reactive oxygen species, Nano Convergence, 5(1), 8 (2018). PDF
[74] B. Dudem, L. K. Bharat, J. W. Leem, D. H. Kim, and J. S. Yu, Hierarchical Ag/TiO2/Si forest-like nano/micro architectures as antireflective, plasmonic photocatalytic, and self-cleaning coatings, ACS Sustainable Chem. Eng., 6(2), 1580-1591 (2018). PDF
2017
[73] J. W. Leem, B. Dudem, and J. S. Yu, Biomimetic nano/micro double-textured silicon with outstanding antireflective and super-hydrophilic surfaces for high optical performance, RSC Adv., 7(54), 33757-33763 (2017). PDF
[72] J. W. Leem+, S. H. Choi+, S. R. Kim, S. W. Kim, K. H. Choi, and Y. L. Kim, Scalable and continuous nanomaterial integration with transgenic fibers for enhanced photoluminescence, Mater. Horiz., 4(2), 281-289 (2017). PDF
2016
[71] B. Dudem, Y. H. Ko, J. W. Leem, J. H. Lim, and J. S. Yu, Hybrid energy cell with hierarchical nano/micro-architectured polymer film to harvest mechanical, solar, and wind energies individually/simultaneously, ACS Appl. Mater. Interfaces, 8(44), 30165-30175 (2016). PDF
[70] J. W. Leem, B. Dudem, and J. S. Yu, Thermal-tolerant polymers with antireflective and hydrophobic grooved subwavelength grating surfaces for high-performance optics, RSC Adv., 6(83), 79755-79762 (2016). PDF
[69] J. W. Leem+, M. Choi+, B. Dudem, and J. S. Yu, Hierarchical structured polymers for light-absorption enhancement of silicon-based solar power systems, RSC Adv., 6(60), 55159-55166 (2016). PDF
[68] D. H. Kang, S. Y. Pae, J. Shim, J. Jeon, J. W. Leem, J. S. Yu, S. Lee, B. Shin, and J. -H. Park, An Ultrahigh-performance photodetector based on a perovskite-transition metal dichalcogenide hybrid structure, Adv. Mater., 28(35), 7799-7805 (2016). PDF
[67] B. Dudem, J. H. Heo, J. W. Leem, J. S. Yu, and S. H. Im, CH3NH3PbI3 planar perovskite solar cells with antireflection and self-cleaning function layers, J. Mater. Chem. A, 4(20), 7573-7579 (2016). PDF
[66] B. Dudem, J. W. Leem, and J. S. Yu, A multifunctional hierarchical nano/micro-structured silicon surface with omnidirectional antireflection and superhydrophilicity via an anodic aluminum oxide etch mask, RSC Adv., 6(5), 3764-3773 (2016). PDF
[65] X. Y. Guan, J. W. Leem, S. H. Lee, and J. S. Yu, Fabrication and analysis of highly-reflective metal-dielectric mirrors for high-performance semiconductor laser applications, Curr. Appl. Phys. 16(2), 155-159 (2016). PDF
2015
[56] C. Kang, J. W. Leem, I. Maeng, T. H. Kim, J. S. Lee, J. S. Yu, and C. -S. Kee, Strong emission of terahertz radiation from nanostructured Ge surfaces, Appl. Phys. Lett., 106(26), 261106 (2015). PDF
[55] N. -H. Kim, M. Choi, J. W. Leem, J. S. Yu, T. W. Kim, T. S. Kim, and K. M. Byun, Improved biomolecular detection based on a plasmonic nanoporous gold film fabricated by oblique angle deposition, Opt. Express, 23(14), 18777-18785 (2015). PDF
[54] J. W. Leem, S. H. Lee, X. Y. Guan, and J. S. Yu, Inverted tetrahedron-pyramidal micropatterned polymer films for boosting light output power in flip-chip light-emitting diodes, Opt. Express, 23(8), 9612-9617 (2015). PDF
[53] J. W. Leem+, S. Kim+, C. Park, E. Kim, and J. S. Yu, Strong Photocurrent Enhancements in Plasmonic Organic Photovoltaics by Biomimetic Nanoarchitectures with Efficient Light Harvesting, ACS Appl. Mater. Interfaces, 7(12), 6706-6715 (2015). PDF
[52] M. Choi, J. W. Leem, and J. S. Yu, Antireflective gradient-refractive-index material-distributed microstructures with high haze and superhydrophilicity for silicon-based optoelectronic applications, RSC Adv. 5(32), 25616-25624 (2015). PDF
[51] J. W. Leem, X. Y. Guan, M. Choi, and J. S. Yu, Broadband and omnidirectional highly-transparent coverglasses coated with biomimetic moth-eye nanopatterned polymer films for solar photovoltaic system applications, Sol. Energy Mater. Sol. Cells 134, 45-53 (2015). PDF
[50] X. Y. Guan, J. W. Leem, S. H. Lee, H. J. Jang, J. H. Kim, S. Hann, and J. S. Yu, Broadband high-reflective distributed Bragg reflectors based on amorphous silicon films for semiconductor laser facet coatings, Appl. Opt., 54(5), 1027-1031 (2015). PDF
[49] J. H. Lim, Y. H. Ko, J. W. Leem, and J. S. Yu, Improvement in light harvesting in dye-sensitized solar cells with antireflective and hydrophobic textile PDMS coating by facile soft imprint lithography, Opt. Express, 23(3), A169-A179 (2015). PDF
[48] J. W. Leem, M. Choi, and J. S. Yu, Multifunctional Microstructured Polymer Films for Boosting Solar Power Generation of Silicon-Based Photovoltaic Modules, ACS Appl. Mater. Interfaces, 7(4), 2349-2358 (2015). PDF
[47] B. Dudem, J. W. Leem, M. Choi, and J. S. Yu, Broadband and wide-angle antireflective characteristics of nanoporous anodic alumina films for silicon-based optoelectronic applications, Appl. Phys. B, 118(3), 439-447 (2015). PDF
2014
[46] J. W. Leem, X. Y. Guan, and J. S. Yu, Tunable distributed Bragg reflectors with wide-angle and broadband high-reflectivity using nanoporous/dense titanium dioxide film stacks for visible wavelength applications, Opt. Express, 22(15), 18519-18526 (2014). PDF
[45] J. W. Leem, J. S. Yu, D. H. Jun, J. Heo, and W. K. Park, Efficiency improvement of III-V GaAs solar cells using biomimetic TiO2 subwavelength structures with wide-angle and broadband antireflection properties, Sol. Energy Mater. Sol. Cells, 127, 43-49 (2014). PDF
[44] J. W. Leem, S. Kim, S. H. Lee, J. A. Rogers, E. Kim, and J. S. Yu, Efficiency Enhancement in Organic Solar Cells Using Hydrophobic Antireflective Inverted Moth-Eye Nanopatterned PDMS Films, Adv. Energy Mater., 4(8), 1301315 (2014). PDF
[43] S. Kim, J. H. Koh, X. Yang, W. S. Chi, C. Park, J. W. Leem, B. Kim, S. Seo, Y. Kim, J. S. Yu, J. H. Kim, and E. Kim, Enhanced device efficiency of bi-layered inverted organic solar cells based on photocurable P3HTs with light harvesting ZnO nanorod array, Adv. Energy Mater., 4(6), 1301338 (2014). PDF
[42] J. W. Leem, J. N. Kim, S. K. Noh, and J. S. Yu, Theoretical modeling and optimization of III-V GaInP/GaAs/Ge monolithic triple-junction solar cells, J. Korean, Phys. Soc., 64(10), 1561-1565. PDF
[41] N. H. Kim, T. W. Kim, K. M. Byun, J. W. Leem, and J. S. Yu, How to avoid a negative shift in reflection-type surface plasmon resonance biosensors with metallic nanostructures: errata, Opt. Express, 22(7), 7931 (2014). PDF
[40] Y. H. Ko, S. H. Lee, J. W. Leem, and J. S. Yu, High transparency and triboelectric charge generation properties of nanopatterned PDMS, RSC advances, 4(20), 10216-10220 (2014). PDF
[39] J. W. Leem, H. K. Lee, D. H. Jun, J. Heo, W. K. Park, J. H. Park, W. J. Cho, D. E. Kim, and J. S. Yu, Electrochemically synthesized broadband antireflective and hydrophobic GaOOH nanopillars for III-V InGaP/GaAs/Ge triple-junction solar cell applications, Opt. Express, 22(S2), A328-A334 (2014). PDF
[38] J. W. Leem, J. S. Yu, J. Heo, W. K. Park, J. H. Park, W. J. Cho, and D. E. Kim, Nanostructured encapsulation coverglasses with wide-angle broadband antireflection and self-cleaning properties for III-V multi-junction solar cell applications, Sol. Energy Mater. Sol. Cells, 120(part B), 555-560 (2014). PDF
2013
[37] S. H. Lee, J. W. Leem, and J. S. Yu, Transmittance enhancement of sapphires with antireflective subwavelength grating patterned UV polymer surface structures by soft lithography, Opt. Express, 21(24), 29298-29303 (2013). PDF
[36] J. W. Leem, Y. M. Song, and J. S. Yu, Biomimetic artificial Si compound eye surface structures with broadband and wide-angle antireflective properties for Si-based optoelectronic applications, Nanoscale, 5(21),10455-10460 (2013). PDF
[35] J. W. Leem, D. H. Jun, J. Heo, W. K. Park, J. H. Park, W. J. Cho, D. E. Kim, and J. S. Yu, Single-material zinc sulfide bi-layer antireflection coatings for GaAs solar cells, Opt. Express, 21(S5), A821-A828 (2013). PDF
[34] J. Shim, J. H. Shin, I. -Y. Lee, D. Choi, J. W. Baek, J. Heo, W. K. Park, J. W. Leem, J. S. Yu, W. -S. Jung, K. Saraswat, and J. H. Park, Effects of point defect healing on phosphorus implanted germanium n+/p junction and its thermal stability, J. Appl. Phys., 114(9), 094515 (2013). PDF
[33] J. W. Leem, M. S. Kim, and J. S. Yu, Broadband highly-transparent sapphires with biomimetic antireflective compound submicron structures for optical and optoelectronic applications, J. Opt. Soc. Am. B, 30(6), 1665-1670 (2013). PDF
[32] C. Kang, J. W. Leem, J. S. Yu, and C. S. Kee, Characteristics of terahertz pulses from antireflective GaAs surfaces with nanopillars, J. Appl. Phys., 113(20), 203102 (2013). PDF
[31] J. W. Leem and J.S.Yu, Design and fabrication of amorphous germanium thin film-based single-material distributed Bragg reflectors operating near 2.2 μm for long wavelength applications, J. Opt. Soc. Am. B, 30(3), 838-843 (2013). PDF
[30] J. W. Leem and J. S. Yu, Multi-functional antireflective surface-relief structures based on nanoscale porous germanium with graded refractive index profiles, Nanoscale, 5(6), 2520-2526 (2013). PDF
[29] J. Shim, I. Song, W .S. Jung, J. Nam, J. W. Leem, J. S. Yu, D. E. Kim, W. J. Cho, Y. S. Kim, D. H. Jun, J. Heo, W. Park, J. H. Park, and K. C. Saraswat, Effects of Thermal Annealing on In-situ Phosphorus Doped Germanium n+/p Junction, IEEE Electron. Dev. Lett., 34(1), 15-17 (2013). PDF
2012
[28] J. W. Leem and J. S. Yu, Wafer-scale highly-transparent and superhydrophilic sapphires for high-performance optics, Opt. Express, 20(24), 26160-26166 (2012). PDF
[27] J. W. Leem, Y. M. Song, and J. S. Yu, Effect of Al-doped ZnO films on periodic GaAs subwavelength grating structures for photovoltaic device applications, Mater. Res. Bull., 47(10), 2884-2887 (2012). PDF
[26] J. W. Leem and J. S. Yu, Bioinspired periodic pinecone-shaped Si subwavelength nanostructures for broadband and omnidirectional antireflective surface, J. Nanosci. Nanotechnol., 12(10), 7932-7938 (2012). PDF
[25] J. W. Leem and J. S. Yu, Broadband and wide-angle distributed Bragg reflectors based on amorphous germanium films by glancing angle deposition, Opt. Express, 20(18), 20576-20581 (2012). PDF
[24] K. M. Byun, N. H. Kim, J. W. Leem, and J. S. Yu, Enhanced surface plasmon resonance detection using porous ITO-gold hybrid substrates, Appl. phys. B, 107(3), 803-808 (2012). PDF
[23] J. W. Leem and J. S. Yu, Indium tin oxide subwavelength nanostructures with surface antireflection and superhydrophilicity for high-efficiency Si-based thin film solar cells, Opt. Express, 20(S3), A431-A440 (2012). PDF
[22] J. W. Leem, Y. M. Song, and J. S. Yu, Hydrophobic and antireflective characteristics of thermally oxidized periodic Si surface nanostructures, Appl. phys. B, 107(2), 409-414 (2012). PDF
[21] J. W. Leem, Y. P. Kim, and J. S. Yu, Tunable behavior of reflectance minima in periodic Ge submicron grating structures, J. Opt. Soc. Am. B, 29(3), 357-362 (2012). PDF
[20] J. W. Leem, Y. Yeh, and J. S. Yu, Enhanced transmittance and hydrophilicity of nanostructured glass substrates with antireflective properties using disordered gold nanopatterns, Opt. Express, 20(4), 4056-4066 (2012). PDF
[19] J. W. Leem, K. S. Chung, and J. S. Yu, Antireflective properties of disordered Si SWSs with hydrophobic surface by thermally dewetted Pt nanomask patterns for Si-based solar cells, Curr. Appl. Phys., 12(1), 291-298 (2012). PDF
2011
[18] J. W. Leem, Y. M. Song, and J. S. Yu, Broadband antireflective germanium surfaces based on subwavelength structures for photovoltaic cell applications, Opt. Express, 19(27), 26308-26317 (2011). PDF
[17] J. W. Leem, Y. M. Song, and J. S. Yu, Six-fold hexagonal symmetric nanostructures with periodic various shapes on GaAs substrates for efficient antireflection and hydrophobic properties, Nanotechnology, 22(48), 485304 (2011). PDF
[16] D. H. Joo, J. W. Leem, and J. S. Yu, Antireflective hydrophobic Si subwavelength structures using thermally dewetted Ni/SiO2 nanomask patterns, J. Nanosci. Nanotechnol., 11(11), 10130-10135 (2011). PDF
[15] B. D. Park, J. W. Leem, and J. S. Yu, Bioinspired Si subwavelength gratings by closely-packed silica nanospheres as etch masks for efficient antireflective surface, Appl. Phys. B, 105(2), 335-342 (2011). PDF
[14] J. W. Leem and J. S. Yu, Physical properties of electrically conductive Sb-doped SnO2 transparent electrodes by thermal annealing dependent structural changes for photovoltaic applications, Mater. Sci. Eng. b, 176(15), 1207-1212 (2011). PDF
[13] J. W. Leem, Y. M. Song, and J. S. Yu, Broadband wide-angle antireflection enhancement in AZO/silicon shell/core subwavelength grating structures with hydrophobic surface for Si-based solar cells, Opt. Express, 19(S5), A1155-A1164 (2011). PDF
[12] J. W. Leem and J. S. Yu, Influence of oblique-angle sputtered transparent conducting oxides on performance of Si-based thin film solar cells, Phys. Status Solidi A, 208(9), 2220-2225 (2011). PDF
[11] J. W. Leem, D. H. Joo, and J. S. Yu, Biomimetic parabola-shaped AZO subwavelength grating structures for efficient antireflection of Si-based solar cells, Sol. Energy Mater. Sol. Cells, 95(8), 2221-2227 (2011). PDF
[10] J. W. Leem, Y. M. Song, Y. T. Lee, and J. S. Yu, Influence of etching process parameters on the antireflection property of Si SWSs by thermally dewetted Ag and Ag/SiO2 nanopatterns, Phys. Status Solidi A, 208(8), 1902-1907 (2011). PDF
[9] Y. H. Ko, J. W. Leem, and J. S. Yu, Controllable synthesis of periodic flower-like ZnO nanostructures on Si subwavelength grating structures, Nanotechnology, 22(20), 205604 (2011). PDF
[8] J. W. Leem and J. S. Yu, Glancing angle deposited ITO films for efficiency enhancement of a-Si:H/uc-Si:H tandem thin film solar cells, Opt. Express, 19(S3), A258-A268 (2011). PDF
[7] J. W. Leem and J. S. Yu, Broadband and wide-angle antireflection subwavelength structures of Si by inductively coupled plasma etching using dewetted nanopatterns of Au thin films as masks, Thin Solid Films, 519(11), 3792-3797 (2011). PDF
[6] J. W. Leem, Y. M. Song, Y. T. Lee, and J. S. Yu, Antireflection characteristics of disordered GaAs subwavelength structures by thermally dewetted Au nanoparticles, Sol. Energy Mater. Sol. Cells, 95(2), 669-676 (2011). PDF
2010
[5] J. W. Leem and J. S. Yu, Structural, optical, and electrical properties of AZO films by tilted angle sputtering method, Thin Solid Films, 518(22), 6285-6288 (2010). PDF
[4] J. W. Leem, Y. M. Song, Y. T. Lee, and J. S. Yu, Effect of etching parameter on antireflection properties of Si subwavelength grating structures using holographic lithography, Appl. phys. B, 100(4), 891-896 (2010). PDF
[3] J. W. Leem, Y. M. Song, Y. T. Lee, and J. S. Yu, Antireflctive properties of AZO subwavelength gratings patterned by holographic lithography, Appl. phys. B, 99(4), 695-700 (2010). PDF
[2] J. W. Leem and J. S. Yu, Device characteristics and metal-dielectric high reflectivity coating analysis of l~ 1.3 um InGaAsP/InGaAsP MQW PBH lasers, Phys. Status Solidi A, 207(1), 217-223 (2010). PDF
2009
[1] J. W. Leem, Y. T. Lee, and J. S. Yu, Optimum design of InGaP/GaAs dual- junction solar cells with different tunnel diodes, Opt. Quantum Electron, 41(8), 605-612 (2009). PDF
Proceedings and Presentations (International)
(Proceedings)
[5] (Invited) J. S. Yu and J. W. Leem, Tailoring of Optical Properties of Porous Nanocolumnar Structures and Their Device Applications by Oblique Angle Deposition, Proc. of SPIE, 8631, 863119, SPIE Photonics West 2013, San Francisco, USA (2013). PDF
[4] (Invited) J. S. Yu, J. W. Leem, Y. H. Ko, and H. K. Lee, Semiconductor Nanostructures Towards Optoelectronic Device Applications, Proc. of SPIE, 8268, 8268A, SPIE Photonics West 2012, San Francisco, USA (2012). PDF
[3] J. W. Leem, Y. M. Song, Y. T. Lee, J. S. Yu, Effect of AZO deposition on antireflective property of Si subwavelength grating structures, AIP Conf. Proc., 1399, 183-184, 30th International Conference on the Physics of Semiconductors (ICPS) 2010, Seoul, Korea (2011). PDF
[2] (Invited) J. S. Yu, Y. H. Ko, H. K. Lee, and J. W. Leem, Zinc oxide nanostructures with metal particles based on surface plasmons for optoelectronic device applications, Proc. of SPIE, 7940, 794009, SPIE Photonics West 2011, San Francisco, USA (2011). PDF
[1] (Invited) J. S. Yu, Y. M. Song, J. W. Leem, and Y. T. Lee, Subwavelength antireflection structures and their device applications, Proc. of SPIE, 7608, 760812, SPIE Photonics West 2010, San Francisco, USA (2010). PDF
(Presentations)
[31] J. W. Leem, J. Park, S. W. Kim, S. R. Kim, S. H. Choi, K. H. Choi, and Y. L. Kim, Visible light activated photocatalysis via genetically encoded hybridization of fluorescent protein and silk, SM07.08.03, 2018 Materials Research Society (MRS) Spring, Phoenix, Arizona, United States (April 2018).
[30] J. W. Leem, S. H. Choi, S. R. Kim, S. W. Kim, K. H. Choi, and Y. L. Kim, Continuous and Scalable plasmonic nanomaterias via hybridization of metal ion and native silk, NM09.16.16, 2018 Materials Research Society (MRS) Spring, Phoenix, Arizona, United States (April 2018).
[29] J. S. Yu and J. W. Leem, Improved conversion efficiency of coverglass-encapsulated III-V triplejunction solar cells using antireflective nanopatterned polymer layers, P05-20, 2018 International Conference on Electronics, Information, and Communication (ICEIC), Honolulu, Hawaii, United States (Jan. 2018).
[28] J. W. Leem, S. H. Choi, K. H. Choi, and Y. L. Kim, Wholly integrated plasmonic fabrics, MSE-Poster-2, US-Korea Conference (UKC) 2016, Dallas, Texas, United States (Aug. 2016).
[27] (Invited) S. H. Choi, J. W. Leem, K. H. Choi, and Y. L. Kim, Biogenic light trapping in natural fibers toward scalable photocatalysis, Collaborative Conference on 3D & Materials Research (CC3DMR) 2016, 38-39, Incheon/Seoul, South Korea (June 2016).
[26] J. W. Leem and J. S. Yu, Highly-tolerant and reflective titanium dioxide stacks with tunability for visible wavelength applications, Photonic West 2015 (SPIE), 9371-73, San Francisco, California, United States (Fab. 2015).
[25] J. G. Heo, J. W. Leem, J. Kim, J. S. Yu, and W. K. Park, Numerical analysis and evaluation of triple junction photovoltaic cells bonded with expanded area of bottom cell, The 6th World Conference on Photovoltaic Energy Conversion (WCPEC-6), 5TuPo.9.5, Kyoto International Conference Center, Kyoto, Japan (Nov. 2014).
[24] S. H. Lee, J. W. Leem, X. Y. Guan, and J. S. Yu, Fabrication and characteristics of glancing-angle deposited metal oxide nanocolumnar strcutures for antireflection layers and reflectors, 16th International Conference on Thin Films, P78/T7, Libertas Rixos Hotel, Dubrovnik, Croatia (Oct. 2014).
[23] X. Y. Guan, J. W. Leem, and J. S. Yu, Highly reflective distributed Bragg reflectors made of titanium dioxide high- and low-refractive-index thin films prepared by glancing angle deposition, The 12th NANO KOREA 2014 symposium, P1404-058, pp.82, Seoul, Korea (July 2014).
[22] J. S. Yu and J. W. Leem, Broadband antireflective GaOOH nanostructures for solar-cell applications, Photonic West 2014, 8981-66, 266, San Francisco, California, United States (Fab. 2014).
[21] J. W. Leem, D. H. Jun, J. Heo, W. K. Park, and J. S. Yu, Efficiency enhancement of encapsulated III-V solar cells using highly-transparent nanostructured coverglasses, Global Photovoltaic Coference 2013 (GPVC 2013), GAS-OL-5, pp.24, Busan, Korea (Nov. 2013).
[20] J. W. Leem, D. H. Jun, J. Heo, W. K. Park, and J. S. Yu, Effect of Ge bottom subcell characteristics on the performance of III-V GaInP/GaAs/Ge triple-junction solar cell on Si substrate, International Symposium on the Physics of Semiconductors and Applications (ISPSA)-XVI, W-P-111, pp.154, Jeju, Korea (July 2013).
[19] J. W. Leem, J. T. Kim, and J. S. Yu, Optimum design of GaInP/GaAs/Ge triple-junction tandem solar cells, International Symposium on the Physics of Semiconductors and Applications (ISPSA)-XVI, W-P-110, pp.153, Jeju, Korea (July 2013).
[18] J. W. Leem, K. S. Chung, and J. S. Yu, Antireflective porous germanium films with graded refractive index profiles using glancing angle deposition, International Symposium on the Physics of Semiconductors and Applications (ISPSA)-XVI, D1-O-02, pp.23, Jeju, Korea (July 2013).
[17] C. Kang, J. W. Leem, J. W. Lee, J. S. Yu, and C. -S. Kee, Terahertz radiations from GaAs surfaces with disordered nano-pillars, Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 37th International Conference on, Thu-Pos-10, pp.1-2, Wollongong, Australia (Sep. 2012).
[16] J. W. Leem and J. S. Yu, Germanium-based distributed Bragg reflectors by glancing angle deposition, International Union of Materials Research Society-International Converences in Asia (IUMRS-ICA) 2012, MoP180, pp.76, Busan, Korea (Aug. 2012).
[15] J. W. Leem and J. S. Yu, Conductive subwavelength grating nanostructures with hydrophilicity for high-efficiency Si-based solar cells, The 10th NANO KOREA 2012 symposium, O1205_013, pp.48, Seoul, Korea (Aug. 2012).
[14] J. W. Leem and J. S. Yu, Highly transparent sapphires with antireflective subwavelength structures using thermally dewetted gold nanoparticles, 4th International Conference on Microelectronics and Plasma technology (ICMAP), N074, pp.337, Jeju, Korea (July 2012).
[13] D. H. Joo, J. W. Leem, and J. S. Yu, Silicon nanostructures with hydrophobic surface using nickel nanoparticles as etch masks, 2011 International Forum on Functional Materials & The 2nd Special Symposium on Advances in Functional Materials (IFFM 2011 & AFM-2), P2-Sa-061, pp.413, Jeju, Korea (July 2011).
[12] J. W. Leem, Y. M. Song, Y. T. Lee, and J. S. Yu, Fabrication of periodic AZO/GaAs nanostructures for solar cell applications, International Forum on Functional Materials (IFFM), Oral-A08, pp.18, Jeju, Korea (July 2011).
[11] J. W. Leem, K. S. Chung, and J. S. Yu, Broadband and omnidirectional antireflection nanostructures of GaAs for high-efficiency optoelectronic devices, International Symposium on the Physics of Semiconductors and Applications (ISPSA)-XV, A7-O-4, pp.247, Jeju, Korea (July 2011).
[10] J. W. Leem and J. S. Yu, Broadband and omnidirectional antireflection nanostructures of GaAs for high-efficiency optoelectronic devices, International Conference on Materials for Advanced Technologies (ICMAT), J-PO2-22, pp.108, Suntec, Singapore (June 2011).
[9] J. W. Leem and J. S. Yu, Optimum design of a-Si:H/uc-Si:H tandem thin film solar cells with a low-refractive-index AZO transparent conducting oxide, International Conference on Solid State Devices and Materials (ssdm), I-9-2, pp.1251-1252, Tokyo, Japan (Sep. 2010).
[8] J. W. Leem and J. S. Yu, Antireflective SnO2 thin films by post heat treatment for solar cell applications, International Union of Materials Research Societies - International Conference on Electronic Materials (IUMRS-ICEM), PIII-229, pp.1251-1252, Goyang, Korea (Aug. 2010).
[7] J. W. Leem, Y. M. Song, Y. T. Lee, and J. S. Yu, Effect of AZO deposition on antireflective property of Si subwavelength grating structures, 30th International Conference on the Physics of Semiconductors (ICPS 2010), P2-025, pp.727, Seoul, Korea (July 2010).
[6] J. W. Leem, Y. M. Song, Y. T. Lee, and J. S. Yu, Effect of etching parameters on antireflection characteristics of Si subwavelength structures using thermally dewetted Ag nanoparticles, Asia–Pacific Conference on Plasma Science and Technology & Symposium on Plasma Science for Materials (APCPST & SPSM), PP447, pp.665, Jeju, Korea (July 2010).
[5] Y. M. Song, J. W. Leem, J. S. Yu, and Y. T. Lee, Fabrication of GaAs nanorod with 6-fold hexagonal symmetry, 2009 International Conference on Nano Science and Nano Technology (ICNNT), EPg-13, pp.504, Muan, Korea (Nov. 2009).
[4] J. W. Leem, Y. M. Song, Y. T. Lee, and J. S. Yu, Influence of Etch Selectivity on Antireflective Properties of Si Subwavelength Grating Structures, 2009 International Conference on Nano Science and Nano Technology (ICNNT), EPg-11, Muan, Korea (Nov. 2009).
[3] J. W. Leem and J. S. Yu, Structural and optical properties of ZnO and AZO by tilted sputtering method, 2nd International Conference on Microelectronics and Plasma Technology (ICMAP), PC3034, pp.401, Busan, Korea (Sept. 2009).
[2] J. W. Leem, Y. T. Lee, and J. S. Yu, Optimum Design of InGaP/GaAs Dual-junction Solar Cells, 9th International Conference on Numerical Simulation of Optoelectronics Devices (NUSOD '09), WA3, pp.83-84, Busan, Korea (Sept. 2009).
[1] J. W. Leem, M. R. Jung, S. W. Park, and J. S. Yu, Influence of cavity length and temperature on device characteristics of 1.3 um InGaAsP MQW PBH lasers, International Symposium on the Physics of Semiconductors and Applications (ISPSA)-XIV, SCS-P-31, pp.305, Jeju, Korea (Aug. 2008).
Proceedings and Presentations (Domestic)
(Presentations)
[37] B. Dudem, 임정우, 유재수, Antireflective properties of micro-pyramidal structured silicon prepared by wet etching, 한국물리학회 2015 봄학술논문발표회, P1-se.002, pp. 115 (Apr. 2015).
[36] B. Dudem, 임정우, 임주호, 유재수, Study of nano/micro structured polymer films for photovoltaic cell applications, 한국물리학회 2015 봄학술논문발표회, C5.03, pp. 68 (Apr. 2015).
[35] B. Dudem, Y. H. Ko, J. W. Leem, S. H. Lee, and J. S. Yu, Fabrication and application of nanostructured PDMS by anodized porous alumina molds for triboelectric nanogenerators, 제 48회 한국진공학회 동계 정기학술대회, ET-002, pp. 60 (Feb. 2015).
[34] 이수현, 임정우, Xiang-Yu Guan, 유재수, 고반사 파장영역 조절이 가능한 분포브래그반사기 제작 및 특성, 제 48회 한국진공학회 동계 정기학술대회, NT-004, pp. 51 (Feb. 2015).
[33] 최민규, 임정우, Xiang-Yu Guan, 유재수, 플렉서블 투명 반도체 소자 응용을 위한 금속 전극 제작 및 특성 연구, 제 48회 한국진공학회 동계 정기학술대회, TW-P040, pp. 49 (Feb. 2015).
[32] 임주호, 임정우, 유재수, “무반사 나노구조 PDMS 필름 코팅을 이용한 염료감응형 태양 전지의 효율 향상 연구”, 제22회 한국반도체학술대회, WP2-71, pp. 97 (Feb. 2015).
[31] (Invited) 임정우, 정관수, 유재수, 효율적인 광포획을 위한 나노구조 제막 및 유기태양전지 응용, 한국물리학회 2014 가을학술논문발표회, KG-01, pp. 82 (Oct. 2014).
[30] Xiang-Yu Guan, 임정우, 유재수, 레이저 다이오드 벽계면 고반사 코팅을 위한 비정질 실리콘 기반 분포브래그반사기 제작 및 특성 연구, 한국물리학회 2014 가을학술논문발표회, P2-K029, pp. 138 (Oct. 2014).
[29] (Invited) 임정우, 유재수, 생체모방 무반사 나노구조를 이용한 태양전지 효율 개선, 제21회 광전자 및 광통신 학술회의, F2D-Ⅲ2, pp. 400-401 (May 2014).
[28] 임정우, 정관수, 유재수, 동일 재료 다공박막 기반의 무반사 코팅을 이용한 태양전지 효율 개선 연구, 한국물리학회 2014 봄학술논문발표회, KG-11, pp. 76, (Apr. 2014).
[27] 임정우, 이수현, Xiang-Yu Guan, 김정태, 정관수, 유재수, 금 나노패턴을 이용한 서브파장구조를 가진 광대역 무반사 글래스의 제작 및 특성, 제 46회 한국진공학회 동계 정기학술대회, T2-005, pp. 279 (Feb. 2014).
[26] 이수현, 임정우, 관상우, 김정태, 유재수, 효율적인 무반사 특성을 갖는 주기적인 실리콘 계층 나노구조 제작 연구, 제 46회 한국진공학회 동계 정기학술대회, TM-P041, pp. 312 (Feb. 2014).
[25] Xiang-Yu Guan, 임정우, 정관수, 유재수, 경사입사증착법을 이용한 이산화 티타늄 박막 기반의 고반사 분포 브래그 반사기 제작 및 특성, 제 46회 한국진공학회 동계 정기학술대회, TT-P028, pp. 350 (Feb. 2014).
[24] 이수현, 임정우, 유재수, PDMS 스탬프를 이용한 나노구조의 제작, 제 45회 한국진공학회 하계 정기학술대회, TT-P008, pp. 217 (Aug. 2013).
[23] 임정우, 유재수, High-n/low-n a-Ge 기반 distributed Bragg reflectors 제작 및 특성, 제20회 광전자 및 광통신 학술회의, T1A-VII2, pp. 169-170 (May 2013).
[22] 임정우, 정관수, 유재수, 열적 산화된 실리콘 나노구조의 표면 및 무반사 특성, 제 44회 한국진공학회 동계 정기학술대회, TT-P014, pp. 16 (Feb. 2013).
[21] 임정우, 전동환, 허종곤, 박원규, 유재수, GaAs 단일접합 태양전지 응용을 위한 무반사 ITO 나노구조, 한국광전자학회 2012, P-76, pp. 21 (Nov. 2012).
[20] 심재우, 송인승, 정우식, 남주형, 임정우, 유재수, 김도억, 조우진, 김양수, 전동환, 허종곤, 박원규, K.C.Saraswat, 박진홍, In-situ로 인이 도핑된 germanium n+/p 정션의 열처리 영향, 한국광전자학회 2012, P-71, pp. 20 (Nov. 2012).
[19] 임정우, 정관수, 유재수, 태양전지 응용을 위한 광대역 및 다방향성의 비주기적 무반사 germanium 나노구조 제작 및 광학적 특성, 한국물리학회 2012 가을학술논문발표회 및 임시총회, KG-17, pp. 174, (Oct. 2012).
[18] 김명섭, 임정우, 고영환, 정관수, 유재수, 광대역 및 전방향 높은 투과도를 갖는 사파이어 나노구조 제작 및 광학적 특성연구, 제 43회 한국진공학회 하계 정기학술대회, TW-P012, pp. 338 (Aug. 2012).
[17] 임정우, 정관수, 유재수, RF 마그네트론 스퍼터링법에 의해 증착된 CdTe 박막의 특성 및 CdS/CdTe 태양전지 응용, 한국물리학회 2012 봄 학술논문발표회 및 제88회 정기총회, P2-K071, pp. 567 (Apr. 2012).
[16] 임정우, 김명섭, 유재수, RF 마그네트론 스퍼터링 방법으로 증착된 CdS 박막의 기판 온도와 열처리 온도 변화에 따른 구조적 및 광학적 특성, 제 42회 한국진공학회 동계 정기학술대회, TF-P033, pp. 340 (Feb. 2012).
[15] 임정우, 유재수, 주기적인 Ge 서브파장 격자 나노구조의 광학적 특성, 한국광학회 제23회 정기총회 및 2012 동계학술대회, F3F-V6, pp. 410-411 (Feb. 2012).
[14] 임정우, 정관수, 유재수, 주기적/비주기적 서브파장 반도체 나노구조의 무반사 특성, 한국물리학회 2011 가을 학술논문발표회 및 임시총회, KG-10, pp. 76 (Oct. 2011).
[13] 임정우, 주동혁, 유재수, a-Si:H 단일접합 태양전지 구조의 다공 ITO 박막의 영향, 제18회 광전자 및 광통신 학술회의, T2A-III4, pp.147-148 (May 2011).
[12] 임정우, 정관수, 유재수, RF 마그네트론 스퍼터링에 의해 증착된 저굴절율 투명전도성 박막의 구조적, 광학적 및 전기적 특성 분석, 한국물리학회 2011 봄 학술논문발표회 및 제87회 정기총회, KP-I-038, pp. 112 (Apr. 2011).
[11] 박범두, 임정우, 유재수, “무반사 막 형성을 위한 실리콘 기반의 나노구조”, 제18회 한국반도체학술대회, TP1-26, pp. 213-214 (Feb. 2011).
[10] 임정우, 유재수, 열적 응집된 Pt 나노입자 마스크를 이용한 실리콘 나노구조 제작, 제 40회 한국진공학회 동계 정기학술대회, T2-P049, pp. 254 (Feb. 2011).
[9] 임정우, 유재수, Au 나노 입자 마스크를 이용한 실리콘 반사방지막 제작, 제 39회 한국진공학회 하계 정기학술대회, T2-P026, pp. 240 (Aug. 2010).
[8] 임정우, 유재수, a-Si:H/uc-Si:H 탠덤 박막태양전지의 최적화 설계, 제17회 광전자 및 광통신 학술회의, TP-30, pp. 14 (May 2010).
[7] 임정우, 유재수, RF magnetron sputtering법으로 증착한 un-doped SnO2 투명전극의 기판-타겟 거리에 따른 특성 분석, 한국물리학회 2010 봄 학술논문발표회 및 제86회 정기총회, KP-II-018 (Apr. 2010).
[6] 임정우, 이동훈, 유재수, RF magnetron sputtering에 의해 제작된 SnO2 투명전극의 구조적 및 광학적 특성, 제 38회 한국진공학회 동계 정기학술대회, TTP-067, pp. 205 (Feb. 2010).
[5] 임정우, 유재수, 효율적인 GaInP p/n 단일접합 태양전지의 설계 및 시뮬레이션, 제21회 광학회 동계학술발표회, pp. 392-393 (Jan. 2010).
[4] 임정우, 송영민, 이용탁, 유재수, 무반사 투명 전극용 AZO 박막의 구조적 및 광학적 특성, 제37회 한국진공학회 하계 정기학술대회, TF-P078, pp. 231 (Aug. 2009).
[3] 임정우, 정관수, 유재수, 단일접합 GaAs/GaAs 태양전지의 활성영역 두께에 따른 최적화 설계, 제16회 광전자 및 광통신 학술회의, TP-21, pp. 13 (May 2009).
[2] 임정우, 이희관, 박범두, 정관수, 유재수, Influence of Gun’s tilting angle on optical properties of AZO for transparent conductive oxide films, 한국물리학회 2009 봄 학술논문발표회 및 제85회 정기총회, KP-IV115, pp. 388 (Apr. 2009).
[1] 임정우, 정관수, 유재수, 2차원 FEM 시뮬레이션을 이용한 650 nm InAlGaP/InGaP 다중양자우물 대면적 레이저다이오드의 열적 분석, 한국광학회 제20회 정기총회 및 2009 동계학술대회, TP-IV1, pp. 265-266 (Feb. 2009).
PATENTS
[23] J. W. Leem, S. M. Park, Y. Ji, S. Kwon, and Y. L. Kim, Method for developing tissue-specific color chart, US663524318, (June 30, 2023).
[22] J. W. Leem, S. M. Park, Y. Ji, S. Kwon, and Y. L. Kim, Method for color correction based on ground truth color chart, US 63524352, (June 30, 2023).
[21] J. W. Leem, S. M. Park, Y. Ji, S. Kwon, and Y. L. Kim, Hyperspectral learning for instantaneous spatiospectral imaging of hemodynamics, US63444522, (Feb. 09, 2023).
[20] J. W. Leem, H. J. Jeon, Y. Ji, S. M. Park, and Y. Kim, Cyber-physical watermarking with inkjet edible bioprinting, PCT/US22/53918 (Dec. 23, 2022).
[19] J. W. Leem, H. J. Jeon, Y. Ji, S. M. Park, and Y. Kim, Method for recognizing fluorescent silk matrix barcodes and device using the method, PCT/KR2023/004629 (May 04, 2023).
[18] J. W. Leem, H. J. Jeon, Y. Ji, S. M. Park, and Y. Kim, Method for fabricating matrix barcodes using fluorescent silk and matrix barcodes generated by the method, PCT/KR2023/004628 (May 04, 2023).
[17] J. W. Leem, S. H. Choi, and Y. Kim, Light activated photoreaction via genetic hybridization of far-red fluorescent protein and silk, U.S. patent No. US11925117B2/US11925118B2 (Mar. 5, 2024).
[16] J.W. Leem and Y.L. Kim, Image processing and authentication of edible unclonable functions, China 202204140P, (May 25, 2022).
[15] J.W. Leem and Y.L. Kim, Image processing and authentication of edible unclonable functions, Europe 20877502.3, (Apr. 13, 2022).
[14] J.W. Leem and Y.L. Kim Image processing and authentication of edible unclonable functions, US 17768293, (Apr. 12, 2022).
[13] J.W. Leem and Y.L. Kim Edible unclonable functions, China 202204139P, (May 25, 2022).
[12] J.W. Leem and Y.L. Kim Edible unclonable functions, Europe 20875975.3, (Apr. 13, 2022).
[11] J.W. Leem and Y.L. Kim Edible unclonable functions, US 17768289, (Apr. 12, 2022).
[10] J. W. Leem, H. J. Jeon, Y. Ji, S. M. Park, and Y. Kim, Cyber-physical watermarking with inkjet edible bioprinting, US63301426 (Jan. 20, 2022).
[9 J. W. Leem, Y. Kwak, and Y. Kim, Pearl-inspired hyperspectral filter arrays, US17518386 (Nov. 3, 2021).
[8] J. W. Leem, Y. M. Song, M. S. Kim, S. H. Choi, and Y. L. Kim, Apparatus for quantum-based physically unclonable functions, US17055557 (July 15, 2021).
[7] J. W. Leem, H. J. Jeon, Y. Ji, and Y. Kim, Antiviral and antibacterial disinfection aero-solution using edible food dyes, US17314908 (May 7, 2021).
[6] J. W. Leem, Y. M. Song, M. S. Kim, S. H. Choi, and Y. L. Kim, Quantum-originated physical unclonable function device, KR10-2177980-0000 (Nov. 6, 2020).
[5] J. W. Leem, Y.M. Song, Y.L. Kim, S.H. Choi, and M.S. Kim, Random lasers toward generating cryptographic primitives, Korea patent application No. PCT/KR2019/005857 (May 15, 2019).
[4] J. W. Leem, S. H. Lee, and J. S. Yu, Fabricating method for antireflection layer with antireflection grating pattern nanostructure and fabricating method for optical element with antireflection layer, Korea patent No. 10-1500167 (Mar. 2015).
[3] J. W. Leem, Y. M. Song, and J. S. Yu, Antireflection layer with subwavelength grating nanostrucuture and fabricating method for the same, Korea patent No. 10-1286398 (July 2013).
[2] J. W. Leem, D. H. Joo, and J. S. Yu, Fabricating method for antireflection subwavelength grating nanostructure and fabricating method for optoelectronic device with antireflection layer, Korea patent No. 10-1078561 (Oct. 2011).
[1] J. W. Leem and J. S. Yu, Sample holder for coating high-reflectivity mirror facet of semiconductor laser diode and method for coating thereof, Korea patent No. 10-0972311 (July 2010).