[14p-P10-1~98] 10 Spintronics and Magnetics（Poster）

▲ [14p-P10-10] Mechanism of Pure Circular Polarization Electroluminescence from
a GaAs-based DH Spin-LED

〇Hiro Munekata¹, Ronel Roca¹, Kazuhiro Nishibayashi¹, Nozomi Nishizawa¹ (1.IIR, Tokyo Tech.)

Keywords:circular-polarization electroluminescence, spin light-emitting diode, re-absorption and stimulated emission

Two different non-linear mechanisms are studied by using the rate equations. The first non-linear mechanism is the induced spin-polarization of the valence band (-Pv) as a consequence of the spin injection into the conduction band (+Pc) and subsequent re-absorption of minority-helicity radiation (sigma+) in an active layer. The second non-linear mechanism is the amplification of majority-helicity radiation (sigma-) through the stimulated emission that occurs not only for the transition {+1/2 => HH +3/2} but also for the transition {-1/2 => LH +1/2}.