[24p-P07-1~7] 3.9 Terahertz technologies

[24p-P07-6] Influence of Photoexcitation on Transmitted THz Wave Form in Thick-Film Silicon

〇Takeshi Moriyasu¹, Hiroki Sato¹, Shudai Katono¹, Daishiro Koide¹, Hideki Sasajima¹, Masahiko Tani², Hideaki Kitahara², Toshiro kohmoto³, Mitsutaka Kumakura¹ (1.Univ. of Fukui, 2.FIR Univ. of Fukui, 3.Kobe Univ.)

Keywords:Carrier dynamics

In Optical pump -Terahertz probe (OPTP) measurement, the discussion of carrier dynamics in the sample that exceed the penetration length is difficult by the inhomogeneous carrier distribution and diffusion effect of carriers. In this study, OPTP measurement was performed on the thick-film silicon with a thickness of ~ 10 μm, which is the order of the penetration length of an excitation wavelength (800 nm). we discuss the carrier dynamics focusing on the changes in amplitude and peak time caused by photoexcitation.