TRANSIENT PHOTOLUMINESCENCE SPECTRA OF GaAs/AlGaAs QUANTUM WELLS, QUANTUM WELL WIRES, AND QUANTUM WELL BOXES

查看全文 作　　者：CHENG [1]Wenqin;HUANG [1]Yi;ZHOU [1]Junming;FENG [1]Wei;WANG [2]Hezhou;SHE [2]Weilong;HUANG [2]Xuguang;LIN [2]Weizhu;YU [2]Zhenxin;XU [3]Geng 机构地区：[1]Institute of Physics,Chinese Academy of Sciences,Beijing 100080;[2]Laboratory of Ultrafast Laser Spectrascopy,Zhongshan University,Guangzhou 510275;[3]Department of Physics,Zhongshan University,Guangzhou 510275 出　　处：《Chinese Physics Letters》索引1990年第7卷第6期,共4页 摘　　要：The interaction of the electrons with the phonons in GaAs/AlGaAs quantum wells,quantum well wires,and quantum well boxes has been studied by meansuring their time resolved photoluminescence(PL)spectra.In the quantum well(Q W)system,relaxation time of the electron energy of the narrower well is shorter than that of the wider well.It is attributed to the stronger interaction of the electrons with the interface mode phonons.In the Q W wires and Q W boxes,the shortening of the relaxation time is obvious.It is due to the stronger electron-phonon interaction caused by the reduction of screening effect.Our experiments also demonstrated the incident laser intensity dependence of the relaxation time. 关 键 词：SPECTRA effect RELAXATION