Liquid crystal photonics with indium tin oxide nanowhiskers and graphene as functional electrodes

Chan-Shan Yang; Ru-Pin Pan; Ci-Ling Pan

doi:10.1117/12.2079324

11 March 2015 Liquid crystal photonics with indium tin oxide nanowhiskers and graphene as functional electrodes

Chan-Shan Yang, Ru-Pin Pan, Ci-Ling Pan

Proceedings Volume 9384, Emerging Liquid Crystal Technologies X; 93840Q (2015) https://doi.org/10.1117/12.2079324
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

We have constructed and characterized THz phase shifters based on liquid crystals (LCs) with graphene grown by chemical vapor deposition (CVD) and indium-tin-oxide nanowhiskers (ITO NWhs) as transparent conducting electrodes. A graphene-based phase shifter can achieve a phase shift of π/2 at 1.0 THz with the operating voltage of ~2.2 V (rms) as opposed to ~ 5.6 V (rms) for ITO-NWhs-based phase shifter in previous work. On the other hand, 2π phase shift at 1.0 THz was achieved in an ITO-NWhs-based phase shifter with a multi-sandwiched structure by applying ~2.6 V (rms). The low operation voltage of both two kinds of phase shifters imply compatibility of both type of devices with thin-film transistor (TFT) and complementary metal-oxide-semiconductor (CMOS) technologies. The experimental results of phase shifters are in good agreement with the theoretical predictions.

Citation Download Citation

Chan-Shan Yang, Ru-Pin Pan, and Ci-Ling Pan "Liquid crystal photonics with indium tin oxide nanowhiskers and graphene as functional electrodes", Proc. SPIE 9384, Emerging Liquid Crystal Technologies X, 93840Q (11 March 2015); https://doi.org/10.1117/12.2079324

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