2023
"Photocarrier dynamics in thick Si film studied by optical pump-terahertz probe spectroscopy," T. Moriyasu, M. Tani, H. Kitahara, T. Furuya, J. Afalla, T. Kohmoto, D. Koide, H. Sato, M. Kumakura, Opt. Comm. 554, 130139 (March 2024)
"Terahertz emission from transient currents and coherent phonons in layered MoSe2 and WSe2," J. Afalla, J. C. Muldera, S. Takamizawa, T. Fukuda, K. Ueno, M. Tani, M. Hase, J. Appl. Phys. 133, 165103 (April 2023)
2022
"Optimum excitation wavelength and photon energy threshold for spintronic terahertz emission from Fe/Pt bilayer" V. K. Mag-usara, M. C. Escaño, C.E. Petoukhoff, G. Torosyan, L. Scheuer, J. Madéo, J. Afalla, M. L. Talara, J. E. Muldera, H. Kitahara, D. R. Bacon, M. Nakajima, K. Dani, E. Th. Papaioannou, R. Beigang, M. Tani, iScience 25, 104615 (July 2022)
2021
"Thickness dependence of the spintronic terahertz emission from Ni/Pt bilayer grown on MgO via electron beam deposition" J. P. Ferrolino, N. I. Cabello, A. E. De Los Reyes, H. Bardolaza, I. C. Verona, V. K. Mag-usara, J. P. Afalla, M. Talara, H. Kitahara, W. Garcia, A. Somintac, A. A. Salvador, M. Tani, E. S. Estacio, Appl. Phys. Express 14, 093001 (Aug 2021)
"Creating terahertz pulses from titanium-doped lithium niobate-based strip waveguides with 1.55 um light", J. E. Muldera, J. P. C. Afalla, T. Furuya, H. Kitahara, E. S. Estacio, K. Saito, Q. Guo, M. Tani, J. Mater. Sci. Mater. Electron. (Aug 2021)
"Effect of heteroepitaxial growth on LT-GaAs: ultrafast optical properties", J. Afalla, E. A. Prieto, H. A. Husay, K. C. Gonzales, G. Catindig, A. Abulikemu, A. Somintac, A. Salvador. E. Estacio, M. Tani, M. Hase, J. Phys. Cond. Matt. 33 315704 (May 2021)
2020
"A modulation-doped heterostructure-based terahertz photoconductive antenna emitter with recessed metal contacts", J. Afalla, A. E. De Los Reyes, N. I. Cabello, V. D. A. Vistro, M. A. Faustino, J. P. Ferrolino, E. A Prieto, H. Bardolaza, G. A. R. Catindig, K. C. Gonzales, V. K. Mag-usara, H. Kitahara, A. S. Somintac, A. A. Salvador, M. Tani, E. Estacio, Scientific Reports 10 19926 (Nov 2020)
"Trilayer low-temperature-grown GaAs terahertz emitter and detector device with doped buffer", E. A. Prieto, A. E. De Los Reyes, V. D. A. Vistro, N. I. Cabello, M. A. Faustino-Lopez, J. P. Ferrolino, J. D. D. Vasquez, H. Bardolaza, J. P. Afalla, V. K. Mag-usara, H. Kitahara, M. Tani, A. Somintac, A. A. Salvador, E. S. Estacio, Appl. Phys. Express 13 082012 (Aug 2020)
"Optical Excitation Wavelength-independent Terahertz Generation Using an Optimized Spintronic Bilayer" V. K. Mag-usara, G. Torosyan, M. Talara, J. Afalla, J. Muldera, H. Kitahara, L. Scheuer, E. Th. Papaioannou, R. Beigang, M. Tani, J. Jpn. Soc. Infrared Sci. Technol. 29(2) pp. 57-62 (Jan 2020) not available online
2019
"Ultrafast carrier dynamics and THz conductivity in epitaxial grown LT-GaAs on Silicon for development of THz photoconductive antenna detectors", J. Afalla, G. Catindig, A. De Los Reyes, E. A. Prieto, M. A. Faustino, V. D. Vistro, K. C. Gonzales, H. Bardolaza, V. K. Mag-usara, H. A. Husay, J. Muldera, N. I. Cabello, J. P. Ferrolino, H. Kitahara, A. Somintac, A. Salvador, M. Tani, E. Estacio, J. Phys. D Appl. Phys. 53(9) 095105 (Dec 2019)
"Enhanced terahertz emission of gallium arsenide thin film on a porous silicon distributed Bragg reflector designed at 800 nm wavelength," A. Jose, A. Montecillo, A. De Los Reyes, M. Bacaoco, J. Lopez, A. Cafe, M. A. Faustino, H. A. Husay, J. D. Vasquez, K. C. Gonzales, G. A. Catindig, J. P. Afalla, V. Mag-usara, H. Kitahara, M. Tani, A. Somintac, A. Salvador, E. Estacio, Opt. Mater. 92 pp. 335-340 (June 2019)
"Efficacy of proposed 2DEG-based photoconductive antenna using magnetic bias-controlled carrier transport" H. R. Bardolaza, J. Afalla, A. De Los Reyes, D. Lumantas, J. D. Vasquez, J. Muldera, V. K. Mag-usara, A. Somintac, A. Salvador, M. Tani, E. Estacio, Current Appl. Phys. 19 (6) pp. 756-761 (June 2019)
"Concurrent measurement of sample and reference waveforms in an optical-pump terahertz-probe system using a controlled optical diaphragm shutter," J. Afalla, T. Moriyasu, H. Kitahara, M. Tani, Journal of Physics and its Applications 1(2) pp. 37-40 (May 2019)
"Photoconductivity, carrier lifetime and mobility evaluation of GaAs films on Si (100) using optical pump terahertz probe measurements," J. Afalla, K. C. Gonzales, E. A. Prieto, G. Catindig, J. D. Vasquez, H. A. Husay, M. A. Tumanguil-Quitoras, J. Muldera, H. Kitahara, A. Somintac, A. Salvador, E. Estacio, M. Tani, Semicond. Sci. Technol. 34 (3) 035031 (Feb 2019)
2018
"Terahertz Emission of Gallium Arsenide on Textured p-type Silicon (100) Substrates Grown via Molecular Beam Epitaxy," K. C. P. Gonzales, K. M. Omambac, E. A. P. Prieto, J. P. C. Afalla, M.H.M. Balgos, R. B. Jaculbia, A. S. Somintac, A. A. Salvador, E. S. Estacio, Journal of Physics and Its Applications 1(1) pp. 7-9 (Dec 2018)
2017
“Defect-related temperature dependence of THz emission from GaAs/AlGaAs MQWs grown on off- and on-axis substrates” J. P. C. Afalla, A. E. de los Reyes, V. K. Mag-usara, L. Lopez Jr., K. Yamamoto, M. Tani, A. Somintac, A. Salvador, and E. Estacio, AIP Advances 7, 125210 (Dec 2017)
“Charge carrier dynamics of GaAs/AlGaAs asymmetric double quantum wells at room temperature studied by optical pump terahertz probe spectroscopy” J. Afalla, K. Ohta, S. Tokonami, E. A. Prieto, G. A. Catindig, K. C. Gonzales, R. Jaculbia, J. D. Vasquez, A. Somintac, A. Salvador, E. Estacio, M. Tani, K. Tominaga, Jpn. J. Appl. Phys. 56 111203 (Nov 2017)
“Coherent Raman Spectroscopy in Terahertz Region by Using Frequency Chirped Optical Pulses” M. Tani, S. Nakae, S. Hayashi, S. Funkner, G. Niehues, H. Kitahara, T. Furuya, K. Yamamoto, J. Afalla, V. Mag-usara, Rev. Laser Eng. (Topical Papers on Ultrafast Laser Technologies), 45 (6) (June 2017) not available online
“Tunneling at room temperature in GaAs/AlGaAs asymmetric coupled double quantum wells observed via time resolved photoluminescence spectroscopy” R. B. Jaculbia, J. P. Afalla, M. H. Balgo, K. Omambac, D. A. Lumantas, A. Salvador, E. Estacio, A. Somintac, Superlattices Microstruct. 109 pp. 324-329 (May 2017)
“Temperature Dependent Conductivity of Graphene Oxide and Graphene Oxide-Polyaniline Nanocomposites Studied by Terahertz Time-Domain Spectroscopy” P. Dutta, J. Afalla, A. Halder, S. Datta, K. Tominaga, J. Phys. Chem. C 121 (3), pp. 1442 – 1448 (Jan 2017)
2016
“Terahertz emission enhancement in semi-insulating gallium arsenide integrated with subwavelength one dimensional metal line array” M. A. B. Faustino, L. P. Lopez, J. P. Afalla, J. Muldera, N. Hermosa, A. A. Salvador, A. S. Somintac, E. S. Estacio, Opt. Lett. 41(19) pp.4515-4517 (Oct 2016)
2015
“Dynamics of Optically-Generated Carriers in Si(100) and Si(111) Substrate-Grown GaAs/AlGaAs Core-Shell Nanowires” R. delos Santos, J.J. Ibanes, M.H. Balgos, R. Jaculbia, J.P. Afalla, M. Bailon-Somintac, E. Estacio, A. Salvador, A. Somintac, C. Que, S. Tsuzuki, K. Yamamoto, M. Tani, Nanoscale Res. Lett. 10 337 (Aug 2015)
“Confined photocarrier transport in InAs pyramidal quantum dots via terahertz time-domain spectroscopy” J.M.M. Presto, E.A.P. Prieto, K.M. Omambac, J.P.C. Afalla, D.A.O. Lumantas, A.A. Salvador, A.S. Somintac, E.S. Estacio, K.Yamamoto, and M.Tani, Opt. Express 23 11 pp.14532-14540 (June 2015)
“Temperature behavior of unstrained (GaAs/AlGaAs) and strained (InGaAs/GaAs) quantum well bandgaps” M.H. Balgos, J.P. Afalla, S. Vizcara D.A. Lumantas, E.Estacio, A. Salvador, A. Somintac, Opt. Quant. Electron. 47 8 pp.3053-3063 (May 2015)
2014
“Shell to core carrier-transfer in MBE-grown GaAs/AlGaAs core-shell nanowires on Si(100) substrates” M. H. Balgos, R. Jaculbia, M. Defensor, J.P. Afalla, J.J. Ibañes, M. Bailon-Somintac, E. Estacio, A. Salvador, A. Somintac, J. Lumin. 155, pp.27-31 (Nov 2014)
2013
“Deep level traps and the temperature behavior of the photoluminescence in GaAs/AlGaAs multiple quantum wells grown on off-axis and on-axis substrates,” J. Afalla, K.A. de las Alas, M. H. Balgos, M.Bailon-Somintac, E. Estacio, A. Somintac, and A. Salvador, J. Lumin. 143 pp. 517-520 (Nov 2013, Available online June 2013)
“Observation of picosecond carrier lifetimes in GaAs/AlGaAs quantum wells grown at 630 °C” J. Afalla, M.H. Balgos, A.Garcia, J.J. Ibanes, A. Salvador, A. Somintac, J. Lumin. 143 pp. 538-541 (Nov 2013, Available online June 2013)
“Application of external tensile and compressive strain on a single layer InAs/GaAs quantum dot via epitaxial lift-off”, K. M. Omambac, J. G. Porquez, J. Afalla, D. Vasquez, M. H. M. Balgos, R. Jaculbia, A. S. Somintac, and A. A. Salvador, Phys. Status Solidi B 250 pp. 1632-1635 (April 2013)
2012
“Terahertz emission from Indium Oxide films grown on MgO substrates using sub-bandgap photon energy excitation” E. S. Estacio, C. T. Que, F. C. B. Awitan, J. I. Bugante, F. I. de Vera, J. Azares, J. Afalla, J. de Vero, A. S. Somintac, R. V. Sarmago, A. A. Salvador, K. Yamamoto, M. Tani, Opt. Express 20(4) pp. 4518-24 (Feb 2012)
2010
“Differentiating AC and DC Field Effects on the Magnetic Susceptibility of Bulk YBa2Cu3O7-δ” J. P. C. Afalla and R. V. Sarmago, Science Diliman Vol 21, No 2 (June 2010)