Open AccessThe calculation of terahertz wave power radiated from GaAs photoconductive antenna
Author(s) -
Wenping Jia,
Wei Shi,
Guohui Qu,
Sun Xiao-Fang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.5425
Subject(s) - terahertz radiation , effective radiated power , photoconductivity , antenna (radio) , optics , optoelectronics , physics , photomixing , power (physics) , antenna aperture , radiation , materials science , radiation pattern , laser , terahertz metamaterials , telecommunications , far infrared laser , computer science , quantum mechanics
Based on the Larmor formula, a mathematic model is established to calculate the power of THz wave radiated form the photoconductive antenna. The power of THz waves radiated by GaAs photoconductive antenna under different experimental conditions was calculated by Monte Carlo simulations. The results show that the power of THz radiation can be improved by increasing the bias electric field or the energy of triggering light pulse, and large-aperture photoconductive antenna can emit THz wave with higher power compared with photoconductive antennas with small apertures because the former can carry more photo-generated carriers.