Open AccessPolarization state measurement of terahertz electromagnetic radiation by three-contact photoconductive antenna
Author(s) -
Hiroyuki Makabe,
Yuichiro Hirota,
Masahiko Tani,
Masanori Hangyo
Publication year - 2007
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.15.011650
Subject(s) - polarizer , terahertz radiation , optics , terahertz spectroscopy and technology , photoconductivity , materials science , polarization (electrochemistry) , optoelectronics , terahertz gap , photomixing , terahertz time domain spectroscopy , spectroscopy , ellipsometry , circular polarization , physics , birefringence , far infrared laser , laser , thin film , terahertz metamaterials , microstrip , chemistry , quantum mechanics , nanotechnology
We have fabricated a three-contact photoconductive antenna for the polarization-sensitive detection of terahertz electromagnetic radiation. Taking into account all three photoconductive signal current components, this three-contact photoconductive antenna can measure the polarization state of pulsed THz radiation at an accuracy comparable to that achieved using the conventional method which employs a set of wire-grid polarizers. The three-contact photoconductive receiver may be useful for polarization-sensitive spectroscopy such as vibrational circular dichroism spectroscopy and ellipsometry in the THz frequency region.