Ultra-thin terahertz devices based on Pancharatnam-Berry phase

Yan Chen; Shiyi Xiao

doi:10.1117/12.2603555

24 November 2021 Ultra-thin terahertz devices based on Pancharatnam-Berry phase

Yan Chen, Shiyi Xiao

Proceedings Volume 12061, AOPC 2021: Infrared Device and Infrared Technology; 120610L (2021) https://doi.org/10.1117/12.2603555
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

The ultra-thin terahertz functional devices have huge application prospects in information communication, national defense security and energy exploration. However, traditional devices based on propagation phase accumulation often face the problems of large size and low efficiency, unable to achieve complex control of terahertz spectrum and wavefront distribution. These problems seriously hinder the development of terahertz technology in practical applications. The Pancharatnam-Berry(PB) phase metasurface is composed of the same artificial microstructure with different rotation angles. It can realize the phase mutation of the reflected (transmitted) wave by simply changing the rotation angle of the microstructure, thereby realizing the phase gradient or distribution. In this paper, we design a onedimensional focusing lens and a one-dimensional deflector working at 1.17 THz with the designed meta-atoms based on the working principles of PB metasurface, and the thickness of these two devices is only 26 um.

Citation Download Citation

Yan Chen and Shiyi Xiao "Ultra-thin terahertz devices based on Pancharatnam-Berry phase", Proc. SPIE 12061, AOPC 2021: Infrared Device and Infrared Technology, 120610L (24 November 2021); https://doi.org/10.1117/12.2603555

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KEYWORDS

Transmittance

Dielectric polarization

Dielectrics

Phase shift keying

Terahertz radiation

Wavefronts

Polarization

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