Infrared and terahertz integration detection based on optical antennas

Jun Luo; Dong Wei; Chai Hu; Xinyu Zhang; Changsheng Xie

doi:10.1117/12.2538578

14 February 2020 Infrared and terahertz integration detection based on optical antennas

Jun Luo, Dong Wei, Chai Hu, Xinyu Zhang, Changsheng Xie

Proceedings Volume 11428, MIPPR 2019: Multispectral Image Acquisition, Processing, and Analysis; 1142807 (2020) https://doi.org/10.1117/12.2538578
Event: Eleventh International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2019), 2019, Wuhan, China

Abstract

So far, how to acquire an effective method of integration detection covering a relatively wide wavelength range has become a hot topic in the field of high performance radiation detection. In this work, the microstructure patterned Schottky-typed optical antenna is designed and then fabricated on Gallium Arsenide substrate and further used to sense near-infrared lights and terahertz signals, respectively. The wide frequency terahertz waves generated by InAs crystal are measured through patterned optical antenna device, and then the characteristics of transmitted waves are analyzed, it should be noted that the time delay characteristics of transmitted terahertz signals between 5ps and 8ps are different from microstructure patterned optical antenna. Under the conditions of using near-infrared lasers and also adjusting main parameters such as the exposure time, for example, 0.04ms、0.4ms、0.6ms、0.8ms、1.0ms and 1.5ms, in the experiments, the transmitted image characters acquired using functioned optical antennas with different electrode patterns, are analyzed. In the near-infrared transmission experiments, the transmitted bright light points or spots with relatively large distribution density and high intensity and very small structural size (~1μm), are discovered, which distribute over the top layer of electrode zone without metal structures of optical antenna device. The developed detection architecture based on Schottky-typed functioned optical antennas to sense infrared light and terahertz radiation, is expected to integrated sense electromagnetic signals in wide spectrum regime.

Citation Download Citation

Jun Luo, Dong Wei, Chai Hu, Xinyu Zhang, and Changsheng Xie "Infrared and terahertz integration detection based on optical antennas", Proc. SPIE 11428, MIPPR 2019: Multispectral Image Acquisition, Processing, and Analysis, 1142807 (14 February 2020); https://doi.org/10.1117/12.2538578

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KEYWORDS

Optical antennas

Terahertz radiation

Image transmission

Infrared radiation

Gallium arsenide

Beam analyzers

Infrared detectors

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