Principal Investigator

Honors and Awards
[1] Academy Research Fellowship (Grant: 348920) from Academy of Finland (09/2022 – 08/2025)
[2] Oral Presentation Award at Korean Physical Society Spring Meeting from Korean Physical Society (04/2019)
[3] Grand Presentation Award at Global Ph.D. Fellows Symposium from National Research Foundation of Korea (11/2018)
[4] Poster Presentation Award at Korean Physical Society Branch Meeting from Korean Physical Society (06/2018)
[5] Poster Presentation Award at Global Ph.D. Fellows Symposium from National Research Foundation of Korea (12/2017)
[6] Oral Presentation Award at Global Ph.D. Fellows Symposium from National Research Foundation of Korea (12/2016)
[7] Global Ph.D. Fellowship (Grant: 2015H1A2A1033714) from National Research Foundation of Korea (03/2015 – 02/2020)
[8] Poster Presentation Award at Korean Physical Society Spring Meeting from Korean Physical Society (04/2015)
[9] Valedictorian at Commencement Ceremony Selected to Deliver the Graduation Speech (02/2014)
[10] Excellence Award in Undergraduate Research Program from Korea Foundation for the Advancement of Science and Creativity (12/2012)
[11] Oral Presentation Award at Physics Festival & Contest from Samsung Advanced Institute of Technology (08/2012)
[12] National Scholarship (Admission Fee & Full Tuition) from National Research Foundation of Korea (03/2010 – 02/2014)
[13] Science & Technology Club Support from Korean Federation of Science and Technology Societies (09/2011 – 08/2013)
[14] Science-Gifted Student Affiliated with Korea Daegu City Office of Education (04/2004 – 02/2006)

Professional Services
[1] Reviewer for Nature Communications
[2] Reviewer for ACS Nano
[3] Reviewer for Laser & Photonics Reviews
[4] Reviewer for IEEE Transactions on Electron Devices
[5] Reviewer for IEEE International Conference on Nanotechnology
[6] Session Organizer for Two-Dimensional and Nanomaterials, their Fundamentals and Applications at 2022 Europe-Korea Conference on Science and Technology Marseille, France, July 21st 2022

Research Projects
[1] Academy Research Fellowship from Academy of Finland (09/2022 – 10/2022)
Single-Junction Broadband Spectrometers
Individual Grant Awarded as a Principal Investigator
[2] Advanced Grants from European Research Council (09/2020 – 10/2022)
ATOP: Atomically-Engineered Nonlinear Photonics with Two-Dimensional Layered Material Superlattices
[3] Centre of Excellence in Quantum Technology Finland from Academy of Finland (09/2020 – 08/2022)
Hybrid Architectures / Enabling Technologies / Exploring Unconventional Concepts for Future Quantum Technologies
[4] Horizon Research and Innovation Program from European Commission (09/2020 – 03/2022)
S2QUIP: Scalable Two-Dimensional Quantum Integrated Photonics
[5] Global Ph.D. Fellowship from National Research Foundation of Korea (03/2015 – 02/2020)
Conductance Switching of Supercollimated Dirac Electrons by All-Electrically-Controlled Quantum Interference
Individual Grant Awarded as a Principal Investigator
[6] Basic Research Support Program from Ministry of Science and ICT of Korean Government (06/2016 – 05/2019)
Carrier Transport of Graphene Quantum Device Formed by Selective Fluorination and Its Application for Ferroelectric Memory
[7] Nuclear Energy Research Infrastructure Program from National Research Foundation of Korea (06/2015 – 05/2017)
Development of Graphene/Nanowire Hybrid Thin Film on the Surface of SiC Through Electron Beam Irradiation and Creating Localized Point Defects with Electron Spin Unfaired Inside Hexagonal-SiC Substrates
[8] Basic Research Support Program from Ministry of Science and ICT of Korean Government (06/2013 – 05/2016)
Influence of Electron-Hole Puddle to Charge Carrier Transport at Graphene/(Semiconductor, Insulator) Interface Studied by Ballistic Electron/Hole Emission Spectroscopy
[9] Undergraduate Research Program from Korea Foundation for the Advancement of Science and Creativity (05/2012 – 10/2012)
Charge Carrier Transport through Graphene/Semiconductor Interface Studied by Internal Photoemission

Technical Skills
[1] Equipment Set-Up: independently built several measurement systems in the starting lab.
- Internal photoemission (IPE) spectroscopy system consisting of Xenon arc lamp (Newport, 6258 / 6259), lamp power supply (Newport, 69911), power cable (Newport, 70050), lamp housing (Newport, 66902), Ozone eater (Newport, 66087), Ozone exhauster (Newport, 66090), optical filter (Newport, 51352 for 830 nm / 51320 for 630 nm / 51272 for 400 nm / 51250 for 309 nm), monochromator (Oriel, Cornerstone 260 1/4), grating (Newport, 74160 for 600 lines/mm in 600~2500 nm / 74167 for 2400 lines/mm in 180~700 nm), optical fiber (Newport, 77634 in 400~1700 nm / 76840 in 500~250 nm),  slit controller (Newport, 74001), optical lens (Newport, SPX011 plano-convex lens for conversion of dispersed light into parallel light / Newport, SBX016 bi-convex lens for focusing of parallel light), lens holder, InGaAs photodiode (Hamamatsu Photonics, G9230-01 in 950~1550 nm) Si photodiode (Hamamatsu Photonics, S2281-04 in 200~1180 nm), low-noise current pre-amplifier (SR570), probe station, and data acquisition card (National Instruments).
- Current-voltage (I–V) measurement system (2-terminal & 3-terminal) with SMU (Keithley, 2636A).
- Capacitance-voltage (C–V) measurement system with precision LCR meter (Agilent, E4980A).
- Cryogenic measurement system with helium compressor (Trillium, 125 / Lakeshore, CRX-4K).
- Photocurrent mapping system with scanning near-field optical microscopy (WITec alpha300).
[2] Electrical/Optoelectrical/Photonic Measurement: I–V measurement, C–V measurement, Cryogenic measurement, Temperature-dependent electrical characterization, IPE spectroscopy, Photocurrent mapping, Photoresponse/switching characterization, Photoluminescence spectroscopy (WITec alpha300 RA+), Continuous-wave laser (WITec focus innovations, Thorlabs MCLS1, Photonetics), Pulsed laser (home-built femtosecond laser).
[3] Material Processing: CMOS-compatible material (Si, SiO2), Wide bandgap semiconductor (SiC), III-V semiconductor (GaAs), High-k dielectric insulator (Al2O3, HfO2), Nanowire and nanotube-like one-dimensional materials (SW/DWCNTs), Graphene and graphene-like two-dimensional materials (Graphene, h-BN, TMDs, BP, InSe, MXenes, etc.), Topological quantum materials (topological insulator: Bi2Se3, Mott insulator: TaS2, etc.).
[4] Wafer Prep: Chemical mechanical polishing (Logitech, ORBIS), RCA Cleaning, native oxide etching, Ohmic contact formation, Backside contact, etc.
[5] Van der Waals integration: Dry transfer, Semi-dry transfer, Wet transfer. Exfoliation, Heterostructure integration.
[6] Etching: Reactive ion etching (TTL, Labstar / TTL, FABstar / Oxford Instruments, Plasmalab 80Plus / Oxford Instruments, PlasmaPro 100 Estrelas), Wet etching (selective etching, diluted etching, dipping, etc).
[7] Deposition/Growth: E-beam evaporation (MASA, IM-9912 / Temescal, FC-2000 / Angstrom Engineering, 09340), Atomic layer deposition (Beneq, TFS-500 / Lucida D100), Plasma enhanced chemical vapor deposition (Oxford Instruments, Plasmalab 80Plus), Sputtering (Oxford Instruments, Plasmalab 400 / Hitachi, E-1045).
[8] Patterning: E-beam lithography (Vistec, EPBG5000pES / NBL, NB3), Photolithography (Suss Microtec, MA/BA6-8).
[9] Annealing: Rapid thermal annealing (Foton-6), Rapid thermal processing (Jipelec), Furnace PEO (PEO-601/ATV).
[10] Structure Analysis: Scanning confocal Raman spectroscopy (WITec alpha300 RA+), Scanning electron microscopy (Hitachi High-Technologies, S-4800 / FEI, Helios Nanolab600), Spectroscopic ellipsometer (Semilab, SE-2000), Ellipsometer (Elipso Technology, Elli-SE-UaM8), Atomic force microscopy (Bruker, Dimension Icon).
[11] Bonding: Wire bonder (TPT, HB02), Wire bonder (Delvotec, 53XX), Wire bonder (FS bondtec, 5330).
[12] Dicing: Dicing saw (Disco, DAD3220 / Aaron, AR06DM).
[13] Program: Labview, Latex, NanoScope Analysis, Project FIVE, Gwyddion, DesignCAD, AutoCAD, KLayout, Matlab, COMSOL, Origin, Illustrator, Photoshop, EndNote, Word, PowerPoint, Excel.
[14] Calculation: Energy band alignments across the interface, Fermi-level pinning effect depending on interface-trap charge density and dipole charge density, Parallel conduction model for an inhomogeneous junction, Areal fraction of low-barrier patches, Time-evolving probability density of electron wave packets in graphene under superlattice potential, Ballistic carrier transport of injected hot electrons into interface or subsurface.

Teaching Skills
Lecturer
[1] Optoelectronics (03/2024 – 06/2024)
Teaching Assistant
[1] Advanced Placement Course of General Physics (07/2017 – 01/2018)
[2] General Physics Lab (08/2016 – 12/2016)
[3] Advanced Placement Course of General Physics (07/2016 – 01/2017)
[4] Electromagnetism 1 (03/2016 – 06/2016)
[5] Advanced Placement Course of General Physics (07/2015 – 01/2016)
[6] Mathematical Physics 1 (08/2015 – 12/2015)
[7] Mathematical Physics 2 (03/2015 – 06/2015),
[8] Advanced Placement Course of General Physics (07/2014 – 01/2015)
[9] Modern Physics (09/2014 – 12/2014)
[10] Quantum Mechanics 1 (03/2014 – 06/2014)
[11] Modern Physics (08/2013 – 12/2013)
[12] General Physics 1 (03/2013 – 06/2013)
[13] General Physics 2 (08/2012 – 12/2012)
[14] General Physics 1 (03/2012 – 06/2012
[15] Korea International Mathematics Tournament of the Towns (07/2011 – 08/2011)
[16] Advanced Placement Course of General Physics (01/2011 – 02/2011)
[17] General Physics for International Students (12/2010 – 02/2011)
Tutoring
[1] Prep: UNIST Admission Office Mentoring Program (03/2012 – 02/2014)
[2] Help Room: General Physics (09/2010 – 06/2012)
[3] Help Room: Calculus (03/2010 – 06/2010)

Other Activities
[1] Academic Activity in Finland
Vice president of Society of Korean Scientists and Engineers in Finland (2021 – 2022)
https://www.kosesfi.org
[2] Academic Activity in Europe
Session organizer of Europe-Korea Conference on Science and Technology (2022)
https://www.ekc2022.org
[3] Society of Global Ph.D. Fellows Activity
Board committee of Global Ph.D. Fellowship Society (2015 – 2019)
[4] Alumni Network Activity
President of UNIST Alumni Association (2016 – 2019)
http://alumni.unist.ac.kr
[5] Student Council Activity
President of UNIST Graduate Student Association (2016 – 2017)
https://www.facebook.com/gsaunist
[6] Social Activity
Member of the National Unification Advisory Council in Republic of Korea (2015)
[7] Summer School Activity
Summer School of Condensed Matter Physics by Korea Physical Society and Korea Institute for Advanced Study (2015)
[8] Club Activity
Vice president of the UNIST Club Association (2012)
https://www.facebook.com/unistclubunion/
President of the UNIST Math & Physics Academic Club (2011)
https://www.instagram.com/unist_eoe/
https://www.facebook.com/eoeunist/