Comparison of back and top gating schemes with tunable graphene fractal metasurfaces

Date

2016

Editor(s)

Advisor

Supervisor

Co-Advisor

Co-Supervisor

Instructor

Source Title

ACS Photonics

Print ISSN

2330-4022

Electronic ISSN

Publisher

American Chemical Society

Volume

3

Issue

12

Pages

2303 - 2307

Language

English

Journal Title

Journal ISSN

Volume Title

Series

Abstract

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. © 2016 American Chemical Society.

Course

Other identifiers

Book Title

Citation