Title :
Terahertz Radiation Generated by Laser Induced Plasma in Photoconductive Antenna
Author :
Lei Hou ; Suguo Chen ; Zhijin Yan ; Wei Shi
Author_Institution :
Appl. Phys. Dept., Xi´an Univ. of Technol., Xi´an, China
Abstract :
To theoretically analyze the spectral characteristics of terahertz (THz) electromagnetic radiation generated by photoconductive antennas, the paper proposed a model by considering laser induced plasma in photoconductive antenna. At a bias voltage, plasma oscillation generates Langmuir wave that propagates in the inhomogeneous plasma in the direction of density gradient, and is converted to THz radiation after a converse zone. The influence factors of the bandwidth and peak frequency are analyzed by the model and testified by experiment.
Keywords :
antennas; inhomogeneous media; plasma Langmuir waves; plasma density; plasma devices; plasma production by laser; plasma sheaths; terahertz wave generation; Langmuir wave; THz radiation; converse zone; density gradient; inhomogeneous plasma; laser induced plasma; photoconductive antenna; sheath; spectral characteristics; Antennas; Educational institutions; Electric fields; Electromagnetic scattering; Oscillators; Plasma density; Langmuir wave; photoconductive antenna; plasma; sheath;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2013.2275019
