[19a-PA3-1~6] 3.6 Ultrashort-pulse and high-intensity lasers

[19a-PA3-5] Polarized dependence of optical response in transient reflectivity measurement for GaAs crystals

〇Hiromu Matsumoto¹, Takashi Kitashima¹, Yu Mishima¹, Fujio Minami¹, Yosuke Kayanuma^1,2, Kazutaka Nakamura¹ (1.MSL Tokyo Tech., 2.Dept. Phys. OPU.)

Keywords:semiconductor, femtosecond laser, coherent phonon

We measured transient reflectivity of GaAs by using pump-probe measurement, with femtosecond pulses. We observed spike-shaped optical response when a pump pulse and a probe pulse overlap. This optical response has polarization dependence. This dependence may originate from EO-sampling technique. We also report coherent control experiments with a pair of phase-locked pump pulses.