Research Article Open Access

Designing High Performance Optical Metamaterial Narrowband Notch Filters

Abstract

Thin film technology has played an important role for optical filters with many complex designs and configurations used, such as Bragg, Dichroic and Rugate. In recent years, metamaterials have aimed to simplify the configuration and improve performance by applying the complexity to the material itself. In this research, we put forward a design technique that integrates visible wavelength plasmonic resonators with nano pyramid structured anti-reflection coatings to produce high performance fixed-line notch filters at visible wavelengths. The pyramid structure notch filters can provide a high transmission band surrounding the rejected wavelengths by mimicking gradient index transitions, whilst remain shift-free for oblique incidence angles, unlike the thin film counterparts. As an example, this research also demonstrates a 532 nm notch filter specifically designed for laser glare and dazzle protection.

James N Monks, Andrew Hurst, Zengbo Wang

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