Effecting factor of peak frequency of THz wave from photoconductive antennas

Suguo Chen; Wei Shi; Lei Hou; Ruijuan Dai

doi:10.1117/12.919655

13 March 2012 Effecting factor of peak frequency of THz wave from photoconductive antennas

Suguo Chen, Wei Shi, Lei Hou, Ruijuan Dai

Proceedings Volume 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology; 833016 (2012) https://doi.org/10.1117/12.919655
Event: Photonics and Optoelectronics Meetings 2011, 2011, Wuhan, China

Abstract

Photoconductive antennas with different structures generate terahertz (THz) waves with different peak frequencies at the same experimental conditions, so does the same antenna at different experimental conditions. It is necessary to investigate the determinants of peak frequencies of THz radiation from photoconductive antenna to obtain the THz wave with required peak frequency. In this paper, the factors of laser spot size, trapping time, carrier lifetime, carrier density, bias field, antenna gap size were analyzed based on our experiment and literatures. The peak frequency moved to higher frequency with the decrease of antenna gap size, carrier lifetimes, trapping time, laser beam diameter, and the peak frequency moved to lower frequency with the decrease of bias field, carrier densities.

Citation Download Citation

Suguo Chen, Wei Shi, Lei Hou, and Ruijuan Dai "Effecting factor of peak frequency of THz wave from photoconductive antennas", Proc. SPIE 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology, 833016 (13 March 2012); https://doi.org/10.1117/12.919655

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