| Photonic Crystal HIDE Materials Engineering (1998) | |||||||||||
Abstract | |||||||||||
| Milestone results have been achieved in the design, processing and testing of dielectric and metallodielectric composite materials for the control of IR emissivity. Our theoretical analyses have shown that an omnidirectional reflectivity band can be produced with high dielectric contrast, multilayer structures. The theory was applied to design and fabricate a structure comprised of alternating Te and polymer layers that were produced by low cost evaporation and spin coating processes, respectively. These materials exhibit near perfect, omnidirectional reflectivity in the 8-12 mm range, and they can be easily fabricated for response within the 2-25 mm range. In the next term, we will develop a design foundation for materials selection and microstructural processing. We have developed a novel, low-cost process for the periodic placement of micron-dimensioned spheres and clusters of metal particles in two dimensional arrays. This process is the first example of stamping and filling a template with high precision at dimensions relevant to metallodielectric HIDE materials. A novel waveguide which utilizes the omnidirectional mirror to localize light in air was developed. This in turn led to the discovery of an optical coaxial waveguide which supports a TEM like mode in a a non-metallic structure.. Prepared in cooperation with MIT Photonic Crystal HIDE Materials Engineering Team. Includes Attachments 1-7. | |||||||||||
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