Min, Kyung-Gu Yee, Ki-Ju Stanton, Christopher J. Song, Jin-Dong Jho, Young-Dahl 2024-01-20T09:32:23Z 2024-01-20T09:32:23Z 2021-09-04 2014-07 1533-4880 https://pubs.kist.re.kr/handle/201004/126661 We have studied the characteristics of longitudinal-optical-phonon-plasmon coupled (LOPC) mode by using the ultrashort pulsed laser with 45 THz bandwidth as a function of thickness in InAs epilayers, ranging from 10 to 900 nm. We have observed the LOPC modes split into the upper (L+ mode) and the lower (L- mode) branches only in the classical scale, but the longitudinal-optical (LO) phonon peak was persistently observed. The shorter decay time of the plasmon-like L+ modes rather than the phonon-like L- modes should be associated with carrier-carrier scattering which is further considered with diffusion properties in the low-gap semiconductors. This result leads to that the absence of the LOPC modes in a scale less than exciton Bohr radius manifests the role of electron diffusion rather than the carrier screening via drift motion in surface depletion region. English AMER SCIENTIFIC PUBLISHERS COHERENT PHONONS SCATTERING EXCITATION GAAS Electron and Phonon Coupling Dynamics in Low-Gap Semiconductor: Quantum versus Classical Scale Article 10.1166/jnn.2014.8298 1 JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.14, no.7, pp.5177 - 5180 JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 14 7 5177 5180 scie scopus 000332926400057 2-s2.0-84903846581 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article COHERENT PHONONS SCATTERING EXCITATION GAAS Longitudial Optical Phonon Plasmon Diffusion Coupling