Heterodyne electro-optic sampling of terahertz waves with divergent probe beam

Authors

Yasumoto Takuro ⋅ JP Research Center for the Development of Far-Infrared Region, University of Fukui
Hiroyuki Kato ⋅ JP Research Center for the Development of Far-Infrared Region, University of Fukui
Daiki Gotoh ⋅ JP Research Center for the Development of Far-Infrared Region, University of Fukui
Hideaki Kitahara ⋅ JP Research Center for the Development of Far-Infrared Region, University of Fukui
Koji Yamamoto ⋅ JP Research Center for the Development of Far-Infrared Region, University of Fukui
Takashi Furuya ⋅ JP Research Center for the Development of Far-Infrared Region, University of Fukui
Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman
Michael I. Bakunov ⋅ RU Department of General Physics, University of Nizhny Novgorod
Masahiko Tani ⋅ JP Research Center for the Development of Far-Infrared Region, University of Fukui

Abstract

In the terahertz (THz) heterodyne electro-optic (EO) sampling, a spatially distributed EO signal over the cross section of the probe beam is observed corresponding to the difference frequency generation (DFG) and sum frequency generation (SFG). We investigate the efficiency of the heterodyne EO sampling depending on the beam focusing condition to the photo detector. The probe beam is incident on to photo-detectors under the focusing beam or divergent beam condition, and the detection efficiencies of the THz wave are compared in the two conditions. The observed time waveforms show that the EO signal amplitude in the divergent beam condition is four times larger compared to the focusing beam condition.

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Issue

2016: Proceedings of the 34th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2016-3B-02

Section

Optics and Photonics

Published

2016-08-18

How to Cite

[1]

Y Takuro, H Kato, D Gotoh, H Kitahara, K Yamamoto, T Furuya, E Estacio, MI Bakunov, and M Tani, Heterodyne electro-optic sampling of terahertz waves with divergent probe beam, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-3B-02 (2016). URL: https://proceedings.spp-online.org/article/view/SPP-2016-3B-02.