Impulsive terahertz radiation with high electric fields from an amplifier-driven large-area photoconductive antenna

被引：138

作者：

Beck, M. ^{[1
,2
]}

Schaefer, H. ^{[1
,2
]}

Klatt, G. ^{[1
,2
]}

Demsar, J. ^{[1
,2
]}

Winnerl, S. ^{[3
]}

Helm, M. ^{[3
]}

Dekorsy, T. ^{[1
,2
]}

机构：

[1] Univ Konstanz, Dept Phys, D-78457 Constance, Germany

[2] Univ Konstanz, Ctr Appl Photon, D-78457 Constance, Germany

[3] Forschungszentrum Rossendorf, Inst Ion Beam Phys & Mat Res, D-01314 Dresden, Germany

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 09期

关键词：

GENERATION; PULSES; GAAS; EXCITATION; OVERSHOOT; EMISSION;

D O I：

10.1364/OE.18.009251

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the generation of impulsive terahertz (THz) radiation with 36 kV/cm vacuum electric field (1.5 mW average thermal power) at 250 kHz repetition rate and a high NIR-to-THz conversion efficiency of 2 x 10(-3). This is achieved by photoexciting biased large-area photoconductive emitter with NIR fs pulses of mu J pulse energy. We demonstrate focussing of the THz beam by tailoring the pulse front of the exciting laser beam without any focussing element for the THz beam. A high dynamic range of 10(4) signal-to-noise is obtained with an amplifier based system. (C) 2010 Optical Society of America

引用

页码：9251 / 9257

页数：7

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