Tunable narrowband IR absorption in graphene nanoribbon/silicon photonic crystal coupled resonators

Arun Nagpal; Ming Zhou; Ognjen Ilic; Zongfu Yu; Harry A. Atwater

doi:10.1117/12.2610369

5 March 2022 Tunable narrowband IR absorption in graphene nanoribbon/silicon photonic crystal coupled resonators

Arun Nagpal, Ming Zhou, Ognjen Ilic, Zongfu Yu, Harry A. Atwater

Proceedings Volume PC12003, 2D Photonic Materials and Devices V; PC120030E (2022) https://doi.org/10.1117/12.2610369
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Due graphene’s robustness as an element in a variety of optoelectronic and photonic platforms, the material can be coupled to other resonant structures to realize functionality beyond that predicted by its constituent optical properties alone. Here we demonstrate a tunable graphene metasurface that exhibits near-unity absorptance over a narrowband range of wavelengths. We hybridize a guided mode resonance of a silicon photonic crystal with the localized surface plasmon of a graphene ribbon to produce a critically coupled system. We investigate various geometric configurations to realize a diversity of Fano lineshapes and incorporate coupled mode theory to quantitatively describe our results.

Conference Presentation

Citation Download Citation

Arun Nagpal, Ming Zhou, Ognjen Ilic, Zongfu Yu, and Harry A. Atwater "Tunable narrowband IR absorption in graphene nanoribbon/silicon photonic crystal coupled resonators", Proc. SPIE PC12003, 2D Photonic Materials and Devices V, PC120030E (5 March 2022); https://doi.org/10.1117/12.2610369

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