[Tu-P2-D] Control of spin state and device application

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)

[Tu-P2-D-04] Ultrafast Dynamics of the Inverse Orbital Hall Effect in Gallium Nitride Studied by Polarization-Resolved Terahertz Spectroscopy

〇Kota Aikyo¹, Ami Mi Shirai¹, Tomohiro Fujimoto¹, Yuta Murotani¹, Yuki Kamitani², Jun Yoshinobu¹, Mitsuru Funato², Yoichi Kawakami², Ryusuke Matsunaga¹ (1. Inst. of Solid State Physics, The Univ. of Tokyo (Japan), 2. Department of Electronic Sci. and Eng., Kyoto Univ. (Japan))

Orbital angular momentum (OAM)-to-charge current conversion in GaN was studied by bulk-sensitive polarization-resolved THz spectroscopy with OAM injection by circularly polarized pump. The signal’s pump-energy dependence compared with a microscopic theory confirmed its orbital origin, revealing a subpicosecond lifetime of OAM polarization.