Ultraconfined Plasmonic Hotspots Inside Graphene Nanobubbles

Autor:	Fei, Z, Foley, JJ, Gannett, W, Liu, MK, Dai, S, Ni, GX, Zettl, A, Fogler, MM, Wiederrecht, GP, Gray, SK, Basov, DN
Jazyk:	angličtina
Rok vydání:	2016
Předmět:	Physics::Fluid Dynamics nanoinfrared imaging Graphene nanobubbles heterostructures MD Multidisciplinary Physics::Atomic and Molecular Clusters Physics::Optics Nanoscience & Nanotechnology FDTD simulation plasmon hotspots
Zdroj:	Fei, Z; Foley, JJ; Gannett, W; Liu, MK; Dai, S; Ni, GX; et al.(2016). Ultraconfined Plasmonic Hotspots Inside Graphene Nanobubbles. Nano Letters, 16(12), 7842-7848. doi: 10.1021/acs.nanolett.6b04076. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/8h60c1xg Nano letters, vol 16, iss 12
Popis:	© 2016 American Chemical Society. We report on a nanoinfrared (IR) imaging study of ultraconfined plasmonic hotspots inside graphene nanobubbles formed in graphene/hexagonal boron nitride (hBN) heterostructures. The volume of these plasmonic hotspots is more than one-million-times smaller than what could be achieved by free-space IR photons, and their real-space distributions are controlled by the sizes and shapes of the nanobubbles. Theoretical analysis indicates that the observed plasmonic hotspots are formed due to a significant increase of the local plasmon wavelength in the nanobubble regions. Such an increase is attributed to the high sensitivity of graphene plasmons to its dielectric environment. Our work presents a novel scheme for plasmonic hotspot formation and sheds light on future applications of graphene nanobubbles for plasmon-enhanced IR spectroscopy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::fe0c24cdb2b4f6befc9c9e497c7f1bd7 http://www.escholarship.org/uc/item/8h60c1xg Zobrazit plný text záznamu