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GRAPHENE PHOTONICS

Chameleon graphene surfaces

Nature Photonics volume 15, pages 488–490 (2021)Cite this article

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The unique optical properties of graphene were combined with lithium-ion battery technology to produce multispectral optical devices, with colour-changing capabilities.

The ability to tune the optical response of a material via electrostatic gating is crucial for optoelectronic applications, such as electro-optic modulators, saturable absorbers for mode-locking of a variety of ultrafast and broadband lasers, optical limiters, photodetectors and transparent electrodes1. The SLG band structure, with zero gap, linearly dispersive conduction and valence bands (Fig. 1) enables an easy control of EF and of the threshold for interband optical absorption, with ultra-wide-band tunability4, as well as gate-controllable third-harmonic enhancement6, paving the way for electrically tunable broadband frequency converters for optical communications and signal processing.

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Fig. 1: Basic principle of light interaction with doped graphene.

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  1. Cambridge Graphene Centre, University of Cambridge, Cambridge, UK

    Andrea C. Ferrari

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  1. Andrea C. Ferrari
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Correspondence to Andrea C. Ferrari.

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The author declares no competing interests.

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Ferrari, A.C. Chameleon graphene surfaces. Nat. Photon. 15, 488–490 (2021). https://doi.org/10.1038/s41566-021-00839-2

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