17 May 2016 Metamaterial based narrow bandwidth angle-of-incidence independent transmission filters for hyperspectral imaging
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Abstract
In this work hyperbolic metamaterials are integrated within Bragg transmission filters with the purpose of eliminating the dependence of the center wavelength of a narrow bandwidth transmission peak on the angle of incidence of the incoming TM polarized beam. The structure is composed of a multi-layer stack of dielectric materials with an array of metal wires vertically penetrating the entire structure. Two types of modeling methods are used to simulate the optical properties of the structure, a coupled wave algorithm that uses a transfer matrix method, and finite element modeling. It is shown that narrow band transmission filters can be designed such that the center wavelength of the transmission peak for TM polarized incident light does not change as the angle of incidence of an incoming beam changes. The method is applied to different hypothetical structures operating in the near infrared, mid wave infrared and long wave infrared. A structure operating at 1.5GHz is designed.
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David T. Crouse, David T. Crouse, } "Metamaterial based narrow bandwidth angle-of-incidence independent transmission filters for hyperspectral imaging", Proc. SPIE 9840, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXII, 98400A (17 May 2016); doi: 10.1117/12.2223761; https://doi.org/10.1117/12.2223761
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