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Title: Spectral tunability and enhancement of molecular radiative emission by metal-dielectric-metal stratified plasmonic nanostructure
Authors: Golmakaniyoon, Sepideh
Hernandez-Martinez, Pedro Ludwig
Demir, Hilmi Volkan
Sun, Xiao Wei
Keywords: Nanostructures
Issue Date: 2017
Source: Golmakaniyoon, S., Hernandez-Martinez, P. L., Demir, H. V., & Sun, X. W. (2017). Spectral tunability and enhancement of molecular radiative emission by metal-dielectric-metal stratified plasmonic nanostructure. Applied Physics Letters, 111(9), 093302-.
Series/Report no.: Applied Physics Letters
Abstract: Plasmonic nanostructures have been widely known for their notable capability to enhance spontaneous emission of an electric dipole in their vicinity. Due to the availability of large optical density of states at their metallic surface, the radiative and nonradiative decay channels are dramatically modified. However, enhancement cannot be realized for any desired emissive dipole as the plasmonic resonance frequency is mostly determined intrinsically by the existing plasmonic materials. Although recent studies using metamaterial structures demonstrate a promising approach of tuning the Purcell factor across the emission wavelength, many of the demonstrations lack efficient radiative emission besides the fabrication complexity. Here, we show theoretically and experimentally that a simple metal-dielectric-metal stratified architecture allows for high tunability of the resonance frequency to obtain a maximum radiative decay rate for any desired dipole peak emission wavelength. Owing to the effective cascaded plasmonic mode coupling across the metal-dielectric interfaces, the proposed approach uniquely provides us with the ability to optimize the plasmonic nanostructure for 100% radiative transmission and 3-fold radiative emission enhancement.
ISSN: 0003-6951
DOI: 10.1063/1.4985337
Rights: © 2017 The Author(s) (published by AIP Publishing). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of The Author(s) (published by AIP Publishing). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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