LINE-SHAPE AND LIFETIME STUDIES OF EXCITON LUMINESCENCE FROM CONFINED CUCL THIN-FILMS

被引：43

作者：

SHUH, DK

WILLIAMS, RS

SEGAWA, Y

KUSANO, J

AOYAGI, Y

NAMBA, S

机构：

[1] UNIV CALIF LOS ANGELES,CTR SOLID STATE SCI,LOS ANGELES,CA 90024

[2] INST PHYS & CHEM RES,FRONTIER RES PROGRAM,WAKO,SAITAMA 35101,JAPAN

[3] UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90024

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.44.5827

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Photoluminescence studies have been performed on structures, grown by molecular-beam epitaxy, with thin films of CuCl (30-1200 angstrom) confined between layers of CaF2. Excitons were formed by irradiation of these systems with uv frequencies above the CuCl band gap, and the spectral and temporal dependences of the recombination radiation were compared with those of a bulk CuCl single crystal. We employ a kinetic model to explain why the photoluminescence line shapes of the free excitons in the thin films were characteristic of a much hotter exciton temperature and the lifetimes were much shorter (< 40 ps) than those of the bulk CuCl crystal (850 ps).

引用

页码：5827 / 5833

页数：7

共 26 条

[1] BIEXCITON LIFETIME IN CUCL OBSERVED WITH WEAK PICOSECOND PULSE EXCITATION [J].