FEMTOSECOND SPECTROSCOPIC STUDIES OF THE LATTICE-RELAXATION INITIATED BY INTERACTING ELECTRON-HOLE PAIRS UNDER RELAXATION IN ALKALI-HALIDES

被引:41
作者
SHIBATA, T [1 ]
IWAI, S [1 ]
TOKIZAKI, T [1 ]
TANIMURA, K [1 ]
NAKAMURA, A [1 ]
ITOH, N [1 ]
机构
[1] NAGOYA UNIV,FAC ENGN,DEPT APPL PHYS,FURO,CHIKUSA 46401,JAPAN
来源
PHYSICAL REVIEW B | 1994年 / 49卷 / 18期
关键词
D O I
10.1103/PhysRevB.49.13255
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Femtosecond time-resolved spectroscopic studies have been carried out to reveal the relaxation of free electron-hole pairs in KBr. We find that a hole is relaxed to a self-trapped hole with a delay of 10 ps. Two relaxation channels of an electron-hole pair are found: one lasts for 40 ps and leads competitively to a self-trapped exciton (STE) or an F-H pair; the other terminates within 6 ps, bypasses the STE, and leads to an F-H pair. The former channel is ascribed to the interplay between an electron and a self-trapped hole, while the latter demonstrates the dynamic interplay of an electron and a hole during their lattice relaxation.
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页码:13255 / 13258
页数:4
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