Waveguide-based reflective super-resolution THz imaging

Zhengxin Wang; Gang Liu; Xinyu Li; Lanjun Guo; Cheng Gong; Weiwei Liu

doi:10.1117/12.2602695

9 October 2021 Waveguide-based reflective super-resolution THz imaging

Zhengxin Wang, Gang Liu, Xinyu Li, Lanjun Guo, Cheng Gong, Weiwei Liu

Proceedings Volume 11906, Infrared, Millimeter-Wave, and Terahertz Technologies VIII; 119060F (2021) https://doi.org/10.1117/12.2602695
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

Here we describe a novel reflective confocal scanning method for super-resolution terahertz (THz) imaging. The traditional continuous-wave THz confocal method is difficult to break through the diffraction limit owing to the Abbe limit. So, it’s difficult to achieve super-resolution images, especially in low frequency THz wavebands. Besides, the traditional terahertz lens system has a large loss, so it cannot achieve long-distance transmission and imaging. In this paper, low-cost and low-loss terahertz waveguides are printed to replace conventional lenses. Through the reasonable design of the waveguide, we can breaks through the diffraction limit and achieve sub-wavelength focusing, so as to achieve super-resolution terahertz imaging. The final experimental resolution is less than half of the wavelength.

Citation Download Citation

Zhengxin Wang, Gang Liu, Xinyu Li, Lanjun Guo, Cheng Gong, and Weiwei Liu "Waveguide-based reflective super-resolution THz imaging", Proc. SPIE 11906, Infrared, Millimeter-Wave, and Terahertz Technologies VIII, 119060F (9 October 2021); https://doi.org/10.1117/12.2602695

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