Energy transfer by exciton-polaritons and secondary excitons in a KBr:I crystal

被引：2

作者：

Kirm, M ^{[1
]}

Martinson, I ^{[1
]}

Lushchik, A ^{[1
]}

Lushchik, C ^{[1
]}

Maaroos, A ^{[1
]}

Vasilchenko, E ^{[1
]}

机构：

[1] ESTONIAN ACAD SCI, INST PHYS, TARTU 2400, ESTONIA

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 97卷 / 10期

关键词：

insulators; optical properties; luminescence; synchrotron radiation;

D O I：

10.1016/0038-1098(95)00747-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The excitation spectra of I--centre luminescence and self-trapped exciton pi and sigma emissions have been measured in the region 6.7-33 eV for a KBr:I crystal at 8 K. The energy transfer to the I--centre by secondary triplet excitons has been revealed. This process is detected in the region of Br- and K+ ionisation by 15-17 or 28-30 eV photons, respectively. Formation of orthoexcitons by 6.79 eV photons leads to the effective excitation of sigma emission. The impurity luminescence can be effectively excited in the region of lower polaritonic branch and paraexciton formation.

引用

页码：851 / 855

页数：5

共 22 条

[1] TIME-RESOLVED STUDIES OF EXCITONIC POLARITONS [J].