QUASI-2-DIMENSIONAL EXCITONS IN (ZN,CD)SE/ZNSE QUANTUM-WELLS - REDUCED EXCITON LO-PHONON COUPLING DUE TO CONFINEMENT EFFECTS

被引：192
作者：
PELEKANOS, NT
DING, J
HAGEROTT, M
NURMIKKO, AV
LUO, H
SAMARTH, N
FURDYNA, JK
机构：
[1] BROWN UNIV,DEPT PHYS,PROVIDENCE,RI 02912
[2] UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556
来源：
PHYSICAL REVIEW B | 1992年 / 45卷 / 11期
关键词：
D O I：
10.1103/PhysRevB.45.6037
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Quasi-two-dimensional (2D) excitons in (Zn,Cd)Se/ZnSe quantum wells were investigated. We observed a confinement-induced enhancement of the exciton binding energy to a value greater than the longitudinal-optical (LO) -phonon energy. This unusual condition results in an effective reduction of the exciton-LO-phonon coupling. As a consequence, excitonic absorption features in this quantum-well system are well preserved to room temperature and beyond.
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页码：6037 / 6042
页数：6
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