在可扩展大面积光电导天线中实现可调谐窄带太赫兹脉冲产生

Tunable narrowband THz pulse generation in scalable large area photoconductive antennas.

作者信息

Krause Johannes, Wagner Martin, Winnerl Stephan, Helm Manfred, Stehr Dominik

机构信息

Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden Rossendorf, P.O. Box 510119, 01314 Dresden, Germany.

出版信息

Opt Express. 2011 Sep 26;19(20):19114-21. doi: 10.1364/OE.19.019114.

DOI:10.1364/OE.19.019114

PMID:21996852

Abstract

The generation and characterization of narrowband THz pulses by means of chirped pulse difference frequency generation in Auston-switch type photoconductive antennas is reported. Using optical pulses with energies in the range from 1 nJ to 1 µJ, we generate THz pulses with up to 50 pJ in energy and electric field strengths on the order of 1 kV/cm. Two emitter concepts are investigated and circumvention of the fast saturation for small area excitation by scaling of the THz emitter is demonstrated.

摘要

报道了通过在奥森开关型光电导天线中利用啁啾脉冲差频产生来生成窄带太赫兹脉冲并对其进行表征。使用能量范围从1 nJ到1 µJ的光脉冲，我们生成了能量高达50 pJ且电场强度约为1 kV/cm的太赫兹脉冲。研究了两种发射器概念，并展示了通过缩放太赫兹发射器来规避小面积激发时的快速饱和现象。