[20p-S223-1~8] 13.7 Nano structures and quantum phenomena

△ [20p-S223-8] Observation of spin relaxation in In_0.8Ga_0.2As/Al_0.5Ga_0.5As/AlAs_0.56Sb_0.44 coupled double quantum wells

〇tomoki ishikawa¹, Shinichiro Gozu², Teruo Mozume², Masaki Asakawa¹, Shunsuke Ohki¹, Atsushi Tackeuchi¹ (1.Waseda Univ., 2.AIST)

Keywords:spin relaxation,coupled double quantum wells

In this study, we have investigated the spin relaxation mechanism in InGaAs/AlGaAs/AlAsSb coupled double quantum wells(CDQWs) by time-resolved spin-dependent pump and probe measurements. As a result, this sample had newly slow component of spin relaxation which was not observed in InGaAs/AlAs/AlAsSb CDQWs due to different coupling barrier layer between InGaAs wells.