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Detection of Terahertz Pulsed Radiation by Using Heterodyne Electro‐Optic Sampling Scheme
Author(s) -
Tani Masahiko,
Bakunov Michael I.,
Yamamoto Kohji,
Horita Kazuki,
Kinoshita Tetsuya,
Nagase Tomohiro
Publication year - 2014
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.11553
Subject(s) - terahertz radiation , optics , sampling (signal processing) , heterodyne detection , heterodyne (poetry) , polarization (electrochemistry) , materials science , optical rectification , terahertz spectroscopy and technology , optoelectronics , physics , nonlinear optics , laser , detector , chemistry , acoustics
SUMMARY A new electro‐optic (EO) sampling scheme, which we refer to as “heterodyne EO sampling,” for the detection of pulsed terahertz (THz) waves is proposed and demonstrated. In this heterodyne EO sampling scheme, the intensity change in the sampling optical pulse induced by a THz field in a nonlinear crystal is measured without using any polarization optics. Applied in conjunction with the noncollinear Cherenkov phase matching technique, this method allows efficient and easy detection of pulsed THz wave using a simpler optical setup than in the conventional EO sampling method.