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Proceedings Paper

Analysis of terahertz generation characteristic affected by injured photoconductive antenna
Author(s): Hui Li; Wen-hui Fan; Jia Liu
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Paper Abstract

In this paper, we deployed a home-made THz time-domain system and experimentally investigated the influence of impairment on photoconductive antenna. The low temperature grown GaAs photoconductive antenna (PCA) was used as THz emitter and a <110< ZnTe crystal modulating the probe beam to detect the THz field based on electro-optic sampling. By adjusting the position of laser spot on PCA gap, we found that the generated THz signal was quite different as the laser beam irradiating on different position of the antenna’s gap. Moreover, we found that the small burned holes on the edge of both metal electrodes may affect the electric field of the antenna. Furthermore, we simulated the electric field of the PCA with a DC biased voltage applied across the electrodes, and found that the simulation results agreed with the experimental phenomenon, which can well demonstrated that the impairments on the antenna electrodes have a great influence on THz generation.

Paper Details

Date Published: 23 August 2013
PDF: 6 pages
Proc. SPIE 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications, 89090I (23 August 2013); doi: 10.1117/12.2033033
Show Author Affiliations
Hui Li, Xi’an Institute of Optics and Precision Mechanics (China)
Wen-hui Fan, Xi'an Institute of Optics and Precision Mechanics (China)
Jia Liu, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 8909:
International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications
Marco Rahm; Konstantin Vodopyanov; Wei Shi; Cunlin Zhang, Editor(s)

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