Effective receiving area of the antenna-coupled terahertz detector

Qingkai Mao; Xuecou Tu; Lei Xu; Chao Wan; Lin Kang; Jian Chen; Peiheng Wu

doi:10.1117/1.OE.53.2.023103

27 February 2014 Effective receiving area of the antenna-coupled terahertz detector

Qingkai Mao, Xuecou Tu, Lei Xu, Chao Wan, Lin Kang, Jian Chen, Peiheng Wu

Author Affiliations +

Optical Engineering, Vol. 53, Issue 2, 023103 (February 2014). https://doi.org/10.1117/1.OE.53.2.023103

Abstract

In order to accurately characterize the radio frequency (RF) responsivity of the antenna-coupled detector in the terahertz (THz) band, we introduce an iterative deconvolution algorithm to extract the effective receiving area. We use this method to characterize an antenna-coupled Nb ₅N₆ microbolometer as an example. The effective receiving area is approximately 0.7 mm ² , which is 7.4 times larger than the physical area of the detector. The RF responsivity of the Nb ₅N₆ microbolometer is 480 V/W at 0.28 THz, including the effect of the antenna coupling and the substrate interference. This work offers an effective way to characterize antenna-coupled THz detectors and to analyze the element-to-element spacing along two orthogonal directions in THz focal plane array chips.

Citation Download Citation

Qingkai Mao, Xuecou Tu, Lei Xu, Chao Wan, Lin Kang, Jian Chen, and Peiheng Wu "Effective receiving area of the antenna-coupled terahertz detector," Optical Engineering 53(2), 023103 (27 February 2014). https://doi.org/10.1117/1.OE.53.2.023103

Published: 27 February 2014

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