Open AccessUltrabroadband polarization analysis of terahertz pulses
Author(s) -
Amjad Hussain,
S. R. Andrews
Publication year - 2008
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.16.007251
Subject(s) - terahertz radiation , optical rectification , optics , electric field , birefringence , polarization (electrochemistry) , optoelectronics , photoconductivity , materials science , detector , terahertz spectroscopy and technology , pockels effect , terahertz gap , physics , nonlinear optics , terahertz metamaterials , laser , far infrared laser , chemistry , quantum mechanics
We describe the characteristics of a sensitive photoconductive detector that simultaneously measures orthogonal electric field components of electromagnetic transients with bandwidths up to 30 THz. The device consists of an As(+) implanted GaAs photoconducting region at the centre of a pair of perpendicular bow-tie antennas. The performance is illustrated by studies of optical rectification in GaSe, retardation in a birefringent polymer film and THz emission from impulsively excited optical phonons in GaN.