Open AccessA matter of symmetry: terahertz polarization detection properties of a multi-contact photoconductive antenna evaluated by a response matrix analysis
Author(s) -
Gudrun Niehues,
Stefan Funkner,
Dmitry S. Bulgarevich,
Seiji Tsuzuki,
Takashi Furuya,
Kōji Yamamoto,
Mitsuharu Shiwa,
Masahiko Tani
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.016184
Subject(s) - terahertz radiation , polarizer , optics , terahertz spectroscopy and technology , materials science , polarization (electrochemistry) , detector , optoelectronics , physics , birefringence , chemistry
While terahertz time domain spectroscopy (THz-TDS) is a well-established technique, polarization sensitive measurements are challenging due to the need of broadband polarization devices. Here, we characterize our recently introduced multi-contact photoconductive detector antenna with a response matrix analysis. We show that the lead lines attached to electrodes reduce the antenna symmetry and thereby influence the properties of the response matrices. With a wire grid polarizer, we simulate a sample influencing the polarization angle and the intensity of the incident THz pulse. Evaluating the measurements with the response matrix analysis, our results show a well agreement of the adjusted and measured polarization angles and intensities over a frequency range from 0.25 to 0.8 THz.