Strong Purcell effect in anisotropic $\epsilon$-near-zero metamaterials

Abstract

We theoretically demonstrate the strong Purcell effect in $\epsilon$-near-zero ultra-anisotropic uniaxial metamaterials with elliptic isofrequency surface. Contrary to the hyperbolic metamaterials, the effect does not rely on the diverging density of states and evanescent waves. As a result, both the radiative decay rate and the far-field emission power are enhanced. The effect can be realized in the periodic layered metal-dielectric nanostructures with complex unit cell containing two different metallic layers.

4 pages, 3 figures

References in corpus (2)

• Epsilon-Near-Zero (ENZ) Metamaterials and Electromagnetic Sources: Tailoring the Radiation Phase Pattern
• Microscopic model of Purcell enhancement in hyperbolic metamaterials

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