TRANSIENT ABSORPTION DUE TO SELF-TRAPPED EXCITONS IN NABR AND NAI

被引：31

作者：

EDAMATSU, K

SUMITA, M

HIROTA, S

HIRAI, M

机构：

[1] Department of Applied Physics, Faculty of Engineering, Tohoku University

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.47.6747

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Optical transient absorption due to self-trapped excitons (STE's) in both NaBr and NaI crystals has been investigated. Both crystals exhibited optical absorption in a region below 1 eV, peaks of which might be located below 0.23 eV, due to the electronic transitions in the STE. The absorption bands due to the hole transitions appeared at 1.6 and 3.2 eV in NaBr, and at 1.4 and 3.0 eV in NaI, which were very close to those due to the V(k) centers. Absorption bands at 3.2 eV in NaBr decayed with two components, the intensity of which reflected the initial population in the triplet sublevels. These results strongly suggest the ''on-center'' configuration of the STE in NaBr and NaI.

引用

页码：6747 / 6750

页数：4

共 23 条

[1] RADIATIVE AND NONRADIATIVE PROCESSES OF F-CENTERS AND F'-CENTERS IN NABR AND NAI [J].