Date on Master's Thesis/Doctoral Dissertation

5-2025

Document Type

Master's Thesis

Degree Name

M.S.

Department

Physics and Astronomy

Degree Program

Physics, MS

Committee Chair

Mendes, Sergio B.

Committee Member

Sumanasekera, Gamini

Committee Member

Bhatia, Bikram

Committee Member

Smadici, Serban

Author's Keywords

thin-film; Black-body; reflection; pyroelectric; energy systems

Abstract

Essential to pyroelectric energy systems is the ability for a pyroelectric material to achieve high temperatures rapidly. In pursuit of augmenting this process, several thin-film optical filters were designed for transmitting laser excitation in the near-infrared region, while simultaneously reflecting black-body radiation for pyroelectric materials. Designs include a classical Fabry-Perot structure with gold and tantalum pentoxide, an induced transmittance filter with silica, hafnia, and gold, and an indium-tin-oxide filter with silica, alumina, and ITO. Performance varies depending on the design. The Fabry-Perot filter experimentally showed a maximum transmittance of 42% at 1.04 μm and an infrared reflectance of 98%. The induced transmittance filter was modeled to have a peak transmittance of 96% at 1.06 μm and an average infrared reflectance of 95% from 1.5 to 7.5 μm. Different ITO filters experimentally showed transmittance as high as 91.4% at 811 nm and reflectance as high as 92% at 8 μm.

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