GENERATION AND DETECTION OF COHERENT OPTICAL PHONONS IN GERMANIUM

被引：93

作者：

PFEIFER, T ^{[1
]}

KUTT, W ^{[1
]}

KURZ, H ^{[1
]}

SCHOLZ, R ^{[1
]}

机构：

[1] RHEIN WESTFAL TH AACHEN,INST THEORET PHYS,W-5100 AACHEN,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.69.3248

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Coherent optical phonons are generated impulsively in Ge by irradiation with femtosecond laser pulses. They are detected via reflectivity modulations in the time domain in a pump-probe configuration. The deformation potential of the optical phonon is responsible both for the generation and for the detection process. The excitation of the coherent optical phonons is explained by anisotropic weakening of bonding valence orbitals.

引用

页码：3248 / 3251

页数：4

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