Jun Luo, Dong Wei, Chai Hu, Xinyu Zhang, Changsheng Xie
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11428/1142807/Infrared-and-terahertz-integration-detection-based-on-optical-antennas/10.1117/12.2538578.short
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.
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