Accession Number : AD1028150


Title :   Dielectric Metamaterial Reflector


Descriptive Note : Technical Report,18 Feb 2016,14 Feb 2017


Corporate Author : SRI International Menlo Park, United States


Personal Author(s) : Krishnamurthy,Srini


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1028150.pdf


Report Date : 14 Feb 2017


Pagination or Media Count : 35


Abstract : The overall goal of this project is to develop paint-like and/or applique material with very high reflectivity and low absorptivity in near infrared region of electromagnetic spectrum. In this Year 1 of the project, we have designed metamaterial with an effective real-impedance of zero, which is predicted to have a reflectivity close to 100 at a chosen wavelength. We exploited Mie resonance in monodisperse wavelength-sized particles to achieve effectively zero real impedance. In our design, we choose the size of the non-absorbing dielectric spheres to achieve Mie resonance at the wavelength of interest, a dielectric coating thickness to maintain periodicity under self-assembly conditions, and transparent binder medium amenable to either paint-like material or applique. We have optimized the design by including nonlinear absorption, materials defects and thermal propagation for enhanced reflection and angular performance.


Descriptors :   reflectivity , dielectrics , metamaterials , particles , coatings , electromagnetism


Subject Categories : Optics
      Electricity and Magnetism
      Optics
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE