Terahertz Homodyne Self-Mixing Transmission Spectroscopy

T Mohr,Stefan Breuer, D Blomer,M Simonetta,S Patel,Malte Schlosser,Anselm Deninger,Gerhard Birkl,Guido Giuliani,Wolfgang Elsasser

APPLIED PHYSICS LETTERS（2015）

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摘要

A compact homodyne self-mixing terahertz spectroscopy concept is experimentally investigated and confirmed by calculations. This method provides amplitude and phase information of the terahertz radiation emitted by a photoconductive antenna in a transmission experiment where a rotating chopper wheel serves as a feedback mirror. As a proof-of-principle experiment the frequency-dependent refractive index of Teflon is measured. (C) 2015 AIP Publishing LLC.

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