Open AccessTime-dependent theoretical model for terahertz wave detector using a parametric process
Author(s) -
Chao Jiang,
J. S. Liu,
Bin Sun,
K. J. Wang,
Shouze Li,
Jianquan Yao
Publication year - 2010
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.18.018180
Subject(s) - terahertz radiation , optics , detector , physics , monochromatic color , pulse (music) , parametric statistics , terahertz spectroscopy and technology , statistics , mathematics
We have presented a time-dependent theoretical model to describe the time behavior of a quasi-monochromatic nanosecond terahertz detector reported by Guo et al. [Appl. Phys. Lett. 93, 021106 (2008)]. The temporal input-output characteristic of the detector is investigated numerically by taking the system parameters close to the experimental ones, and the calculated pulse width for the incident terahertz wave agrees well with the experimental one. Our results demonstrate that the energy and width of an output idler wave pulse are proportional to those of the incident terahertz wave pulse. This study provides a strict theoretical basis and could be used to guide the design and optimization for the highly sensitive coherent terahertz detector.