CUED Publications database

Comparison of Back and Top Gating Schemes with Tunable Graphene Fractal Metasurfaces

Aygar, AM and Balci, O and Cakmakyapan, S and Kocabas, C and Caglayan, H and Ozbay, E (2016) Comparison of Back and Top Gating Schemes with Tunable Graphene Fractal Metasurfaces. ACS Photonics, 3. pp. 2303-2307.

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Abstract

© 2016 American Chemical Society. In this work, fractal metasurfaces that consist of periodic gold squares on graphene are used to increase light-graphene interaction. We show by simulations and experiments that higher level fractal structures result in higher spectral tunability of resonance wavelength. This is explained by higher field localization for higher level fractal structures. Furthermore, spectral tunability of fractal metasurfaces integrated with graphene is investigated comparing two different schemes for electrostatic gating. Experiment results show that a top-gated device yields more spectral tunability (8% of resonance wavelength) while requiring much smaller gate voltages compared to the back-gated device.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 22 Mar 2018 01:27
Last Modified: 24 Nov 2020 08:36
DOI: 10.1021/acsphotonics.6b00440