Double-layer graphene for enhanced tunable infrared plasmonics

Light, Science & Applications
Daniel RodrigoHatice Altug

Abstract

Graphene is emerging as a promising material for photonic applications owing to its unique optoelectronic properties. Graphene supports tunable, long-lived and extremely confined plasmons that have great potential for applications such as biosensing and optical communications. However, in order to excite plasmonic resonances in graphene, this material requires a high doping level, which is challenging to achieve without degrading carrier mobility and stability. Here, we demonstrate that the infrared plasmonic response of a graphene multilayer stack is analogous to that of a highly doped single layer of graphene, preserving mobility and supporting plasmonic resonances with higher oscillator strength than previously explored single-layer devices. Particularly, we find that the optically equivalent carrier density in multilayer graphene is larger than the sum of those in the individual layers. Furthermore, electrostatic biasing in multilayer graphene is enhanced with respect to single layer due to the redistribution of carriers over different layers, thus extending the spectral tuning range of the plasmonic structure. The superior effective doping and improved tunability of multilayer graphene stacks should enable a plethora of fu...Continue Reading

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Citations

Nov 8, 2018·The Analyst·Gregory Q Wallace, François Lagugné-Labarthet
Jun 19, 2020·Light, Science & Applications·Sehong ParkSeong Chan Jun
Jan 17, 2021·Nanomaterials·Zhendong YanChaojun Tang
Apr 1, 2021·ACS Applied Materials & Interfaces·Seemesh BhaskarSai Sathish Ramamurthy
Apr 24, 2021·Physical Review Letters·Qiaoxia XingHugen Yan
Jun 6, 2021·Light, Science & Applications·Sehong ParkSeong Chan Jun
Jun 24, 2021·Nature Communications·Sang-Hyun OhMichael S Strano
Aug 8, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Guangyu DuQiaoliang Bao
May 4, 2018·ACS Applied Materials & Interfaces·Hao-Bo JiangHong-Bo Sun
Nov 24, 2021·Optics Express·Yuyu Li, Roberto Paiella
Nov 10, 2018··Anton ZaitsevMikhail K. Khodzitsky
Jun 28, 2018··Aleksandrs LeitisDaniel Rodrigo

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Methods Mentioned

BETA
surface plasmon resonances
electron beam lithography

Software Mentioned

Ansys HFSS

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