[12p-A501-1~16] 10.4 半導体スピントロニクス・超伝導・強相関

▲ [12p-A501-10] Spin dynamics of electrons accumulated in light induced potential dots

〇Haruki Sanada¹、Yoji Kunihashi¹、Alexander M. Stramma¹、Yusuke Tanaka¹、Hideki Gotoh¹、Koji Onomitsu¹、Fedele Tagarelli¹、Makoto Kohda²、Junsaku Nitta²、Takehiko Tawara¹、Tetsuomi Sogawa¹ (1.NTT-BRL、2.Tohoku Univ.)

キーワード：spin relaxation, spin-orbit interaction

Confining carriers in micro/nano-scale structures is essential technique for controlling spin coherence in semiconductor spintronics. We report a mechanism which enables us to design temporal and reconfigurable potential dots generated by simple light exposure in semiconductors. The results of time and spatially-resolved Kerr rotation measurements performed on a GaAs quantum well reveal that the light-induced dot effectively confines the electrons and enhances the spin lifetime determined by fluctuating spin-orbit effective magnetic fields.