Strong enhancement of light-matter interaction in graphene coupled to a photonic crystal nanocavity

Xuetao Gan; Kin Fai Mak; Yuanda Gao; Yumeng You; Fariba Hatami; James Hone; Tony F. Heinz; Dirk Englund

doi:10.1021/nl302746n

Strong enhancement of light-matter interaction in graphene coupled to a photonic crystal nanocavity

Xuetao Gan, Kin Fai Mak, Yuanda Gao, Yumeng You, Fariba Hatami, James Hone, Tony F. Heinz, Dirk Englund

Physics

Research output: Contribution to journal › Article

188 Scopus citations

Abstract

We demonstrate a large enhancement in the interaction of light with graphene through coupling with localized modes in a photonic crystal nanocavity. Spectroscopic studies show that a single atomic layer of graphene reduces the cavity reflection by more than a factor of one hundred, while also sharply reducing the cavity quality factor. The strong interaction allows for cavity-enhanced Raman spectroscopy on subwavelength regions of a graphene sample. A coupled-mode theory model matches experimental observations and indicates significantly increased light absorption in the graphene layer. The coupled graphene-cavity system also enables precise measurements of graphene's complex refractive index.

Original language	English (US)
Pages (from-to)	5626-5631
Number of pages	6
Journal	Nano letters
Volume	12
Issue number	11
DOIs	https://doi.org/10.1021/nl302746n
State	Published - Nov 14 2012

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All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

Cite this

Gan, X., Mak, K. F., Gao, Y., You, Y., Hatami, F., Hone, J., Heinz, T. F., & Englund, D. (2012). Strong enhancement of light-matter interaction in graphene coupled to a photonic crystal nanocavity. Nano letters, 12(11), 5626-5631. https://doi.org/10.1021/nl302746n

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AU - Hatami, Fariba

AU - Hone, James

AU - Heinz, Tony F.

AU - Englund, Dirk

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10.1021/nl302746n