Transmission and reflection mode switching terahertz metasurface for wavefront manipulation

Mingzhen Zhong; Chunhui Li

doi:10.1117/12.2690207

17 August 2023 Transmission and reflection mode switching terahertz metasurface for wavefront manipulation

Mingzhen Zhong, Chunhui Li

Proceedings Volume 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023); 127573E (2023) https://doi.org/10.1117/12.2690207
Event: 3rd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2023), 2023, Kunming, China

Abstract

Metasurfaces possess the ability to manipulate the wavefront of electromagnetic waves, but the majority of them are limited to single transmission or reflection mode without altering their structure. To address this limitation, we proposed a switchable terahertz metasurface for wavefront manipulation. By capitalizing on the phase transition properties of vanadium dioxide (its conductivity changes with temperature), the metasurface can work in the transmission or reflection mode controlled by temperature. Additionally, we designed 8 encoding elements to achieve phase gradient by changing the shape of the unit element. Finally, we arranged the encoding unit element to create a transmission and reflection mode switching optical device for beam steering and focusing.

Citation Download Citation

Mingzhen Zhong and Chunhui Li "Transmission and reflection mode switching terahertz metasurface for wavefront manipulation", Proc. SPIE 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023), 127573E (17 August 2023); https://doi.org/10.1117/12.2690207

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KEYWORDS

Reflection

Wavefronts

Switching

Dielectrics

Terahertz radiation

Refraction

Switches

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