Second harmonic double resonance cones in dispersive hyperbolic metamaterials

TL;DR

This paper investigates how second harmonic double-resonance cones form in hyperbolic metamaterials, revealing unique propagation channels that enable advanced subwavelength imaging techniques.

Contribution

It demonstrates the formation of second harmonic resonance cones and their potential for subwavelength imaging in dispersive hyperbolic metamaterials.

Findings

Two distinct volume plasmon-polariton channels identified

Large angular divergence enables subwavelength imaging

Resonance cones facilitate second harmonic microscopy

Abstract

We study the formation of second harmonic double-resonance cones in hyperbolic metamaterials. An electric dipole on the surface of the structure induces second harmonic light to propagate into two distinct volume plasmon-polariton channels: A signal that propagates within its own peculiar resonance cone; and a phase-locked signal that is trapped under the pump's resonance cone. Metamaterial dispersion and birefringence induce a large angular divergence between the two volume plasmon-polaritons, making these structures ideal for subwavelength second and higher harmonic imaging microscopy.