META 2021, META'12

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Spontaneous Radiation in Hyperbolic Media
Ivan Iorsh, Alexander Poddubny, Pavel A Belov, Yuri S Kivshar

Last modified: 2011-12-14


We study the spontaneous emission of a dipole emitter embedded into a hyperbolic media. It has been recently reported that the density of states in the hyperbolic medium diverges and thus the spontaneous emission rate of a point dipole will diverge as well. In our work we show how the accounting for the finite dipole size lifts this divergence and obtain rigorous analytical expressions for the emission rate of the finite size emitter. We also study a spontaneous emission rate of the point dipole placed in metal-dielectric metamaterial which in the effective medium approach can be described as a hyperbolic media. We show that effective medium approach may greatly understimate the Purcell factor in such structures due to the presence of effective nonlocality.


metamaterials, plasmonic