ZnCdTe-ZnTe多量子阱的光泵受激发射  

STIMULATED EMISSION BY PHOTOPUMPING IN ZnCdTe ZnTe MULTIPLE QUANTUM WELLS

作　　者：郑伟 范希武[1,2] 郑著宏[1,2] 王惟彪[1,2] 张吉英 杨宝均[1,2] 申德振[1,2] 

机构地区：[1]中国科学院长春物理研究所 [2]中国科学院激发态物理开放研究实验室

出　　处：《发光学报》1997年第2期105-109,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金;中国科学院激发态物理开放研究实验室资助

摘　　要：本文报导了ＺｎＣｄＴｅ－ＺｎＴｅ多量子阱的受激发射机理．阈值时（Ｊｔｈ）受激发射峰相对于激子吸收峰的能量差（１９ｍｅＶ）与激子束缚能接近．激发光强度在３Ｊｔｈ～４．８Ｊｔｈ之间变化时，该能量差随激发光强度的变化规律与激子—激子散射过程的理论结果符合得很好。The processes involved in the stimulated emission by photopumping in ZnCdTe ZnTe multiple quantum wells have been investigated at 77 K. The energy differences (Δ Ε ) between stimulated emission peak and exciton absorption peak at threshold( J th ) is about 19 meV. It is close to the exciton binding energy. The energy difference Δ Ε as a function of excitation intensities( J ), in this experiments, can be express as Δ Ε ∝ J 1/2.2 ,when excitation intensities are in 3 J th ～4.8 J th . Considering the theoretical result Δ Ε ∝ J 1/2 , it is possible to think that the stimulated emission originated from exciton exciton scattering processes when excitation intensities are in the above regions.

关 键 词：多量子阱 受激发射 激子散射 锌镉碲 受激发射 

分 类 号：TN201[电子电信—物理电子学]