Title :
The conduction current and displacement current in a Terahertz antenna
Author :
Jia, WanLi ; Shi, Wei ; Ji, WeiLi ; Chen, SuGuo ; Wu, SiFeng
Author_Institution :
Xi´´an Univ. of Technol., Xi´´an, China
Abstract :
A semiclassical Monte Carlo model is presented to study the time-varying conduction current and displacement current in a Terahertz photoconductive antenna after photoexcitation. We analyzed conduction current and displacement current in a biased GaAs photoconductive antenna after fs laser pulse excitation as a function of bias voltage, pump pulse energy. While we analyzed conduction current and displacement current contribute on THz wave radiation. The simulation results show that the light-intensity dependence mainly influences the pulse amplitudes of the conduction current and the displacement current and THz wave. At the same light-intensity, higher bias field gives larger conduction current. The simulation results show that conduction current and displacement current are source of THz waveform radiated by bias photoconductive current.
Keywords :
Monte Carlo methods; gallium arsenide; photoconducting devices; submillimetre wave antennas; GaAs; THz wave radiation; THz waveform; bias photoconductive current; fs laser pulse excitation; light-intensity dependence; photoconductive antenna; pump pulse energy; semiclassical Monte Carlo model; terahertz antenna; time-varying conduction current analysis; time-varying displacement current analysis; Analytical models; Antenna radiation patterns; Atomic measurements; Conductors; Magnetic domains; Optical pumping; Monte Carlo model; Terahertz; condcution current; displacement current;
Conference_Titel :
Electronics and Optoelectronics (ICEOE), 2011 International Conference on
Conference_Location :
Dalian, Liaoning
Print_ISBN :
978-1-61284-275-2
DOI :
10.1109/ICEOE.2011.6013362