THz-EO sampling using GaAs in Cherenkov-phase-matching scheme at 1.55-μm sampling wavelength

Authors

  • Shinpei Ozawa Research Center for Development of Far-Infrared Region, University of Fukui
  • Syougo Azuma Research Center for Development of Far-Infrared Region, University of Fukui
  • Satoshi Tsuzuki Research Center for Development of Far-Infrared Region, University of Fukui
  • Kohji Yamamoto Research Center for Development of Far-Infrared Region, University of Fukui
  • Takashi Furuya Department of Technology, University of Fukui
  • Kazuyoshi Kurihara Faculty of Education and Regional Studies, University of Fukui
  • Fumiyoshi Kuwashima Department of Electrical, Electric and Computer Engineering, Fukui University of Technology
  • Ramon de los Santos National Institute of Physics, University of the Philippines Diliman
  • Armando Somintac National Institute of Physics, University of the Philippines Diliman
  • Elmer Estacio National Institute of Physics, University of the Philippines Diliman
  • Michael I. Bakunov Department of General Physics, University of Nizhny Novgorod
  • Masahiko Tani Research Center for Development of Far-Infrared Region, University of Fukui

Abstract

In a previous work, we proposed and demonstrated electro-optic (EO) sampling detection of pulsed terahertz (THz) radiation based on the non-collinear Cherenkov phase-matching with a Si-prism coupled LiNbO3 (Si/LN) crystal at 1.55 μm sampling wavelength in a balanced detection setup. However, this EO sampling scheme is complex and requires compensation for birefringence. We also reported a new electro-optic sampling scheme, that is, the “heterodyne EO sampling.” In this heterodyne scheme, compensation for birefringence is not necessary but the signal-to-noise ratio (SNR) is bad compared to balanced detection. In this work, we propose and demonstrate Cherenkov phase-matched EO sampling of THz radiation at 1.55-μm wavelength by using GaAs in a balanced detection setup. This setup is simpler and does not require compensation for birefringence. Experimental results also show better SNR.

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Issue

Article ID

SPP2014-3A-03

Section

Condensed Matter Physics

Published

2014-10-17

How to Cite

[1]
S Ozawa, S Azuma, S Tsuzuki, K Yamamoto, T Furuya, K Kurihara, F Kuwashima, R de los Santos, A Somintac, E Estacio, MI Bakunov, and M Tani, THz-EO sampling using GaAs in Cherenkov-phase-matching scheme at 1.55-μm sampling wavelength, Proceedings of the Samahang Pisika ng Pilipinas 32, SPP2014-3A-03 (2014). URL: https://proceedings.spp-online.org/article/view/1802.