An effective THz modulator with graphene tuned under low voltage with polyethylene oxide-based electrolytes

Qianying Zheng; Linlong Tang; Liangping Xia; Chunlei Du; Hongliang Cui

doi:10.1117/12.2537569

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18 November 2019 An effective THz modulator with graphene tuned under low voltage with polyethylene oxide-based electrolytes

Qianying Zheng, Linlong Tang, Liangping Xia, Chunlei Du, Hongliang Cui

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Proceedings Volume 11196, Infrared, Millimeter-Wave, and Terahertz Technologies VI; 111961C (2019) https://doi.org/10.1117/12.2537569
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

A kind of terahertz amplitude modulation structure has been proposed in this work, which could achieve ~75% modulation depth of transmittance under 10V gate voltage. It is attributed to two side factors, one is making use of metallic metamaterial array which excites terahertz resonance and enhances the interaction between the terahertz wave and graphene. Therefore, the modulation of terahertz transmission could be enhanced. The other factor is adopting polyethylene oxide-based electrolytes, as a kind of high capacitance material to effectively tuned chemical potential of graphene layer which acts as the active material modulating the transmitted energy.

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Qianying Zheng, Linlong Tang, Liangping Xia, Chunlei Du, and Hongliang Cui "An effective THz modulator with graphene tuned under low voltage with polyethylene oxide-based electrolytes", Proc. SPIE 11196, Infrared, Millimeter-Wave, and Terahertz Technologies VI, 111961C (18 November 2019); https://doi.org/10.1117/12.2537569

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