Nonlinear optics and the generation of surface plasmons in graphene

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• Euan Hendry (University of Exeter)
• Wednesday 31 May 2017, 14:30-15:30
• Physics West Seminar LT (117).

If you have a question about this talk, please contact Dr Miguel Navarro-Cia.

Graphene has recently been proposed as next generation plasmonic material. However, due to the large mismatch in length scales between the wavelength of the surface plasmon and that of free space radiation, coupling is a problem. Here, we present recent optical wave-mixing measurements showing the excitation of surface plasmons in planar graphene [1]. A large enhancement of non-linear signal in regions of high density of states suggests a strong coupling to propagatin plasmons in graphene for a variety of in-plane wave-vectors. Estimates regarding the non-linearityof graphene and the efficiency of the nonlinear optical process are inferred from our experiment. These results demonstrate a promising route to efficient generation of surface plasmons in graphene using free-space radiation.

[1] Nature Physics 12, 124–127 (2016)

This talk is part of the Metamaterials and Nanophotonics Group Seminars series.

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• Bham Talks
• Metamaterials and Nanophotonics Group Seminars
• Physics West Seminar LT (117)
• What's on in Physics?

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