SUBPICOSECOND DEACTIVATION OF F-CENTER EXCITATION BY MOLECULAR DEFECTS IN ALKALI-HALIDES

被引：10
|
作者：
JANG, DJ [1 ]
LEE, J [1 ]
机构：
[1] KOREA ADV INST SCI & TECHNOL,CTR MOLEC SCI,TAEJON 305701,SOUTH KOREA
来源：
SOLID STATE COMMUNICATIONS | 1995年 / 94卷 / 07期
关键词：
DISORDERED SYSTEMS; POINT DEFECTS; ELECTRON-ELECTRON INTERACTIONS; TUNNELING; TIME-RESOLVED OPTICAL SPECTROSCOPIES;
D O I：
10.1016/0038-1098(95)00001-1
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
An extremely rapid deactivation process of F center excitation has been observed in OH- or CN- doped alkali halide crystals. This superfast bleach recovery time of F center at 10.5 K is as short as similar to 0.5 ps in CN- doped CsBr and similar to 3 ps in OH- or OD- doped KCl and in OH- doped RbCl. The excitation of F-H center is deactivated mainly by this superfast process which is due to energy transfer from the excited electronic F center into the stretching vibrational mode of the associated molecular defect via vibronic tunneling near the curve crossover point.
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页码：539 / 542
页数：4
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