Spontaneous emission enhancement in metal-dielectric metamaterials
Date
2012
Authors
Iorsh, Ivan
Poddubny, Alexander N
Orlov, Alexey
Belov, Pavel A
Kivshar, Yuri
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Publisher
Elsevier
Abstract
We study the spontaneous emission of a dipole emitter imbedded into a layered metal-dielectric metamaterial. We demonstrate ultra-high values of the Purcell factor in such structures due to a high density of states with hyperbolic isofrequency surfaces. We reveal that the traditional effective-medium approach greatly underestimates the value of the Purcell factor due to the presence of an effective nonlocality, and we present an analytical model which agrees well with numerical calculations.
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Keywords: Metal-dielectric nanostructures; Purcell factor
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Source
Physics Letters A
Type
Journal article
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2037-12-31
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