Active Terahertz Modulator and Slow Light Metamaterial Devices with Hybrid Graphene-superconductor Coupled Split-ring Resonator Arrays

Kalhor, S. et al. (2022) Active Terahertz Modulator and Slow Light Metamaterial Devices with Hybrid Graphene-superconductor Coupled Split-ring Resonator Arrays. In: PhotonIcs and Electromagnetics Research Symposium (PIERS 2022), Hangzhou, China, 25-28 Apr 2022, pp. 967-971. ISBN 9781665460231 (doi: 10.1109/PIERS55526.2022.9792980)

Abstract

The dynamically tunable terahertz (THz) waves and electromagnetically induced transparency (EIT) in coupled hybrid superconducting niobium-graphene split-ring resonator arrays are investigated. Active modulation of THz waves is studied through two different approaches. Thermal tuning of THz amplitude and group delay is observed due to the temperature sensitivity of the niobium superconductor. Stronger photoresponses are observed when niobium is superconducting. The electrical tuning of the integrated hybrid device is accomplished through the integration of graphene patches with the superconducting circuit. The modulation of resonance strength and group delay is observed due to damping of the dark mode resonance in coupled split-ring resonator arrays. The proposed chip-scale device provides a route toward the implementation of active cryogenic THz devices.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Kalhor, Samane and Delfanazari, Dr Kaveh
• Authors: Kalhor, S., Kindness, S.J., Wallis, R., Beere, H.E., Ghanaatshoar, M., Degl'Innocenti, R., Kelly, M.J., Hofmann, S., Joyce, H.J., Ritchie, D.A., and Delfanazari, K.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISBN: 9781665460231
• Published Online: 16 June 2022
• Copyright Holders: Copyright © 2022 IEEE
• Publisher Policy: Reproduced in accordance with the publisher copyright policy