OBSERVATION OF THE FORBIDDEN 2ND-HARMONIC GENERATION IN RESONANCE WITH 2P WANNIER EXCITON IN ZNSE THIN-FILMS

被引：25

作者：

MINAMI, F ^{[1
]}

INOUE, K ^{[1
]}

KATO, Y ^{[1
]}

YOSHIDA, K ^{[1
]}

ERA, K ^{[1
]}

机构：

[1] NATL INST RES INORGAN MAT,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.67.3708

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed for the first time a drastic enhancement of the normally forbidden second-harmonic-generation signal when twice the incident photon energy is resonant with the excitation energy of a 2P exciton in thin ZnSe crystals. Measurements were performed, using a titanium-sapphire laser, at 4.2 K in such a geometrical configuration, x(zz, x or y)z or x(yy, x or y)z, that transitions are forbidden by the usual selection rules. The results are shown to be well accounted for in the framework of a time-dependent perturbation formalism.

引用

页码：3708 / 3711

页数：4

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