Analysis of terahertz generation characteristic affected by injured photoconductive antenna

Hui Li; Wen-hui Fan; Jia Liu

doi:10.1117/12.2033033

23 August 2013 Analysis of terahertz generation characteristic affected by injured photoconductive antenna

Hui Li, Wen-hui Fan, Jia Liu

Proceedings Volume 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications; 89090I (2013) https://doi.org/10.1117/12.2033033
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

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.

Citation Download Citation

Hui Li, Wen-hui Fan, and Jia Liu "Analysis of terahertz generation characteristic affected by injured photoconductive antenna", Proc. SPIE 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications, 89090I (23 August 2013); https://doi.org/10.1117/12.2033033

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KEYWORDS

Terahertz radiation

Antennas

Principal component analysis

Electrodes

Signal detection

Crystals

Sensors

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