Enhancement of spontaneous emission in metal-dielectric multilayer structures accounting losses

Abstract

We study the emission rate enhancement of the dipole emitter centred in the stratified metal-dielectric metamaterial, characterized by the hyperbolic isofrequency surface. We find out a limited enhancement of the Purcell factor in the layered metamaterial. We demonstrate that the radiative decay rate is strongly depends on a ratio of the thickness of layers and is affected by the level of losses in metal.