Phase-Sensitive Terahertz Self-Heterodyne System Based on Photodiode and Low-Temperature-Grown GaAs Photoconductor at 1.55 $\\mu{\\rm m}$

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