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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