Coherent phonon spectroscopy of GaP Schottky diode
Coherent phonon spectroscopy of GaP Schottky diode
复制标题
GaP肖特基二极管的相干声子光谱
DOI:
10.1063/1.1560874
复制
发表时间:
2003
影响因子:
4
通讯作者:
Yu
中科院分区:
文献类型:
--
作者:
Yu
Coherent longitudinal optical and acoustic phonons in GaP Schottky diode are impulsively generated and detected with time-resolved second-harmonic generation. A coherent longitudinal optical (LO) phonon is launched in the near-surface depletion region of GaP. The dephasing time of this coherent LO phonon is ∼10 ps and mainly due to the anharmonic decay into two zone-edge half-energy longitudinal acoustic (LA) phonons. Simultaneously, a coherent LA wave packet is created in the metal–semiconductor interface via transient thermal absorption in the metal thin layer. This acoustic wave packet propagates into the bulk with the sound velocity ∼5.8×105 cm/s of a GaP LA phonon.