Computational and Experimental Development of 2D Anisotropic Photonic Crystal Metamaterials
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States
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The future of optical devices involves manipulation of nanoscale structure in order to achieve full control over the properties of the device. To advance this further, novel samples that incorporate both photonic crystal PhC structure and metamaterial properties, known as PhC metamaterials, are proposed. These PhC metamaterials allow for complete control over the directionality of the light-matter interaction to serve in these new applications. To develop this technology, first, metamaterials with no PhC structure are fabricated using the technique of glancing angle deposition GLAD in the form of nanorod or nanohelical structures. These metamaterials are then characterized using Variable-Angle Spectral Ellipsometry VASE to extract their optical constants. Using these measured effective material parameters, a model for the corresponding metamaterial within a PC structure was developed in COMSOL Multiphysics to calculate the photonic bandgap PBG of that structure. Results show that a material with a complete and large PBG can be achieved with these PhC metamaterials.
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