Time-dependent theoretical model for terahertz wave detector using a parametric process.
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.
Jiang
C Y
CY
Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Liu
J S
JS
Sun
B
B
Wang
K J
KJ
Li
S X
SX
Yao
J Q
JQ
D004582:Electronics, Medical / Q000295:instrumentation*; D004867:Equipment Design; D008962:Models, Theoretical; D009556:Niobium; D017711:Nonlinear Dynamics; D055095:Optics and Photonics / Q000295:instrumentation*; D010087:Oxides; D055053:Terahertz Radiation
D010087:Oxides; D009556:Niobium; C091692:lithium niobate