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Ultrahigh Field Enhancement and Photoresponse in Atomically Separated Arrays of Plasmonic Dimers
Author(s) -
Paria Debadrita,
Roy Kallol,
Singh Haobijam Johnson,
Kumar Shishir,
Raghavan Srinivasan,
Ghosh Arindam,
Ghosh Ambarish
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201404312
Subject(s) - materials science , graphene , plasmon , photodetector , planar , optoelectronics , wavelength , electromagnetic field , nanotechnology , computer graphics (images) , computer science , physics , quantum mechanics
Combining oblique angle deposition with standard graphene transfer protocols , two planar arrays of metal nanoparticles are fabricated that are vertically separated by atomic dimensions, corresponding precisely to the thickness of a single layer of graphene, i.e., 0.34 nm. Upon illumination of light at an appropriate wavelength, the local electromagnetic field at the junction of the dimers can be increased dramatically, thereby resulting in the most sensitive graphene–plasmonic hybrid photodetector reported to date.