2016年 第77回応用物理学会秋季学術講演会

講演情報

一般セッション(口頭講演)

10 スピントロニクス・マグネティクス » 10.4 半導体・有機・光・量子スピントロニクス

[14p-C41-1~21] 10.4 半導体・有機・光・量子スピントロニクス

2016年9月14日(水) 13:15 〜 19:00 C41 (日航4階朱雀A)

大矢 忍(東大)、清水 大雅(農工大)

15:30 〜 15:45

[14p-C41-9] Room temperature spontaneous emission with pure circular polarization on spin-LEDs

Nozomi Nishizawa1、Kazuhiro Nishibayashi1、Hiro Munekata1 (1.Tokyo inst. of Tech.)

キーワード:Semiconductor spintronics, Spin dependent emission

We have reported electroluminescence with almost pure circular polarization (CP) and electrical helicity switching at room temperature, which is a breakthrough in the field of semiconductor-based spintronics device and is also attractive as a new monolithic CP light source. The pure CP emission is achieved in the regime of moderately high current density (J > 100 A/cm2) which is far less than that for stimulated emission of conventional stripe lasers. Also, it is achieved although the maximum CP value obtained through radiative recombination of spin-polarized carriers is restricted to be 0.5 by optical selection rules in a degenerated GaAs layer. We report here the experimental data as a clue to the emission mechanism.