Tamm plasmon polariton with high angular tolerance in heterostructure containing all-dielectric elliptical metamaterials

Abstract

Tamm plasmon polariton (TPP) in heterostructure composed of a metal layer and a conventional one-dimensional photonic crystal (1DPC) strongly shifts toward shorter wavelengths as the incident angle increases. Such angle-sensitive property of TPP greatly limits the operating angular width of TPP-based optical devices. Very recently, researchers found that the angle dependence of the photonic bandgap (PBG) in 1DPC containing all-dielectric elliptical metamaterials (EMMs) can be flexibly tuned from angle-sensitive to angle-insensitive. Herein, we propose a heterostructure composed of a metal layer and a 1DPC containing all-dielectric EMMs to achieve a TPP with high angular tolerance. The angular tolerance of the TPP reaches 30.8°, which is much larger than those of the reported TPPs in heterostructures composed of a metal layer and a conventional 1DPC. Our work provides a feasible route to expending the operating angular width of TPP-based optical devices, such as filters, absorbers, lasers, and sensors.