Pulse-shaper-assisted coherent control of shift currents

被引：6

作者：

Kohli, Kapil K. ^{[1
]}

Mertens, Jan ^{[1
]}

Bieler, Mark ^{[2
]}

Chatterjee, Sangam ^{[1
]}

机构：

[1] Univ Marburg, Fac Phys, D-35032 Marburg, Germany

[2] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2011年 / 28卷 / 03期

关键词：

ULTRAFAST SHIFT; BULK GAAS; SPIN; SEMICONDUCTORS; GENERATION;

D O I：

10.1364/JOSAB.28.000470

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the dynamics of the ultrafast photocurrent process in bulk GaAs. The coherent-control scheme features a pulse shaper and a spatial light modulator. We use the versatility of the setup to create two orthogonally polarized phase-stable femtosecond pulses and manage the shift current density through manipulation of the combined pulse envelope. The behavior of the current induces characteristic terahertz emission patterns that are measured in a standard electro-optical detection scheme. The experimental results are corroborated by a theoretical model that links the behavior of the current density to the pulse envelope. (C) 2011 Optical Society of America

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收藏

页码：470 / 474

页数：5

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