Probing of valley polarization in graphene via optical second-harmonic generation

被引：43

作者：

Wehling, T. O. ^{[1
,2
]}

Huber, A. ^{[3
]}

Lichtenstein, A. I. ^{[3
]}

Katsnelson, M. I. ^{[4
]}

机构：

[1] Univ Bremen, Inst Theoret Phys, Otto Hahn Allee 1, D-28359 Bremen, Germany

[2] Univ Bremen, Bremen Ctr Computat Mat Sci, D-28359 Bremen, Germany

[3] Univ Hamburg, Inst Theoret Phys 1, D-20355 Hamburg, Germany

[4] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 AJ Nijmegen, Netherlands

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 04期

基金：

欧洲研究理事会;

关键词：

MOS2;

D O I：

10.1103/PhysRevB.91.041404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Valley polarization in graphene breaks inversion symmetry and therefore leads to second-harmonic generation. We present a complete theory of this effect within a single-particle approximation. It is shown that this may be a sensitive tool to measure the valley polarization created, e.g., by polarized light and, thus, can be used for the development of ultrafast valleytronics in graphene.

引用

页数：4

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