Dynamic tuning of plasmon resonance in the visible using graphene
Date
2016
Authors
Balci, S.
Balci, O.
Kakenov, N.
Atar, F. B.
Kocabas, C.
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Abstract
We report active electrical tuning of plasmon resonance of silver nanoprisms (Ag NPs) in the visible spectrum. Ag NPs are placed in close proximity to graphene which leads to additional tunable loss for the plasmon resonance. The ionic gating of graphene modifies its Fermi level from 0.2 to 1 eV, which then affects the absorption of graphene due to Pauli blocking. Plasmon resonance frequency and linewidth of Ag NPs can be reversibly shifted by 20 and 35 meV, respectively. The coupled graphene-Ag NPs system can be classically described by a damped harmonic oscillator model. Atomic layer deposition allows for controlling the graphene-Ag NP separation with atomic-level precision to optimize coupling between them.
Source Title
Optics Letters
Publisher
The Optical Society
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Keywords
Atomic layer deposition, Oscillators (electronic), Oscillators (mechanical), Plasmons, Resonance, Silver, Surface plasmon resonance, Tuning, Close proximity, Damped harmonic-oscillator models, Dynamic tuning, Electrical tuning, Plasmon resonance frequencies, Plasmon resonances, Silver nanoprisms, Visible spectra, Graphene, Graphite, Metal nanoparticle, Silver, Chemistry, Energy transfer, Light related phenomena, Procedures, Surface plasmon resonance, Energy Transfer, Graphite, Metal Nanoparticles, Optical Phenomena, Silver, Surface Plasmon Resonance
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English