DocumentCode :
41082
Title :
Phase-Sensitive Terahertz Self-Heterodyne System Based on Photodiode and Low-Temperature-Grown GaAs Photoconductor at 1.55 
Author :
Hisatake, Shintaro ; Kitahara, Genki ; Ajito, Katsuhiro ; Fukada, Youichi ; Yoshimoto, Naoto ; Nagatsuma, Tadao
Author_Institution :
Div. of Adv. Electron. & Opt. Sci., Osaka Univ., Toyonaka, Japan
Volume :
13
Issue :
1
fYear :
2013
fDate :
Jan. 2013
Firstpage :
31
Lastpage :
36
Abstract :
We propose and demonstrate a technique for phase change measurement of a continuous terahertz (THz) wave, based on 1.55- μm photonic techniques. The generation of the THz wave is based on photomixing using a uni-traveling-carrier photodiode. The detection of the THz wave is based on heterodyne mixing of the THz wave, using a low-temperature-grown GaAs photoconductor with frequency-shifted photonic local oscillator signal. The measurement of a phase shift induced by a single sheet of paper with 85-μm thickness has been demonstrated at 300 GHz.
Keywords :
III-V semiconductors; cryogenic electronics; gallium arsenide; heterodyne detection; microwave photonics; millimetre wave measurement; multiwave mixing; phase measurement; photoconducting materials; photodiodes; submillimetre wave measurement; submillimetre wave oscillators; terahertz wave detectors; terahertz wave generation; GaAs; continuous terahertz wave; frequency 300 GHz; frequency-shifted photonic local oscillator signal; heterodyne mixing; low-temperature-grown gallium arsenide photoconductor; phase change measurement; phase shift measurement; phase-sensitive terahertz self-heterodyne system; photomixing; photonic techniques; size 1.55 mum; size 85 mum; terahertz wave detection; terahertz wave generation; unitraveling-carrier photodiode; Frequency measurement; Imaging; Mixers; Optical interferometry; Phase measurement; Photonics; Radio frequency; Continuous wave; low-temperature-grown GaAs; phase sensitive detection; photonic local oscillator (LO); self-heterodyne detection; terahertz (THz) wave;
fLanguage :
English
Journal_Title :
Sensors Journal, IEEE
Publisher :
ieee
ISSN :
1530-437X
Type :
jour
DOI :
10.1109/JSEN.2012.2218281
Filename :
6298925
Link To Document :
