Metamaterial optical antennas powered carbon nanotube detectors with extremely high polarization selectivity

Xiansong Ren; Jing Zhou; Xiaoshuang Chen; Haowen Li; Rui Dong

doi:10.1117/12.2617403

9 December 2021 Metamaterial optical antennas powered carbon nanotube detectors with extremely high polarization selectivity

Xiansong Ren, Jing Zhou, Xiaoshuang Chen, Haowen Li, Rui Dong

Author Affiliations +

Proceedings Volume 12030, Third International Conference on Optoelectronic Science and Materials (ICOSM 2021); 120300O (2021) https://doi.org/10.1117/12.2617403
Event: Third International Conference on Optoelectronic Science and Materials (ICOSM 2021), 2021, Hefei, China

Abstract

In the far-infrared (THz) field, single-walled carbon nanotubes (SWCNTs) are promising candidates for room-temperature and self-powered thermal detectors due to their low specific heat capacity, high stability, relatively large Seebeck coefficients, and the ability to be doped diversely. Especially when the nanotubes are aligned, the photoresponse becomes polarization-sensitive. In this work, we integrated a bowtie antenna stereostructure with a horizontally aligned SWCNTs film to generate new resonance modes and gain mechanisms to improve the polarization extinction ratio (PER) and the response of carbon nanotube far-infrared detectors. While the antenna size changes, we can get PERs higher than 6481 from 0.5THZ to 1.5 THz.

Citation Download Citation

Xiansong Ren, Jing Zhou, Xiaoshuang Chen, Haowen Li, and Rui Dong "Metamaterial optical antennas powered carbon nanotube detectors with extremely high polarization selectivity", Proc. SPIE 12030, Third International Conference on Optoelectronic Science and Materials (ICOSM 2021), 120300O (9 December 2021); https://doi.org/10.1117/12.2617403

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KEYWORDS

Antennas

Terahertz radiation

Polarization

Sensors

Carbon nanotubes

Dielectric polarization

Optical antennas

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