Omnidirectional near-infrared narrowband filters based on defective mirror-symmetry one-dimensional photonic crystals containing hyperbolic metamaterials

Abstract

The photonic band gap (PBG) of conventional all-dielectric one-dimension (1D) photonic crystal (PC) shifts towards the shorter wavelength (blueshift) as the incident angle increases, thus the defect mode in conventional defective all-dielectric 1DPC is also blueshifted. This leads to many limitations on the performance of the narrowband filtering. Recently, the emergence of the redshift PBG in 1DPC containing hyperbolic metamaterials (HMMs) for transverse magnetic (TM) polarization provides a possibility to achieve angle-insensitive defect mode in defective 1DPC containing HMMs. In this paper, we designed a mirror-symmetry 1DPC filter containing HMMs, and the HMM layers consist of subwavelength molybdenum disulfide/indium tin oxide (MoS2/ITO) multilayers, an omnidirectional defect mode at 1805.6 nm was achieved by phase compensation in mirror-symmetry 1DPC containing HMMs for the incident angle of 0˚-60˚, with a transmittance efficiency of 100 % at the vertical incidence. The position of the omnidirectional defect mode can be adjusted flexibly. This omnidirectional narrowband defect mode has important implications in the fields of sensors, detectors, and filters.