Fabrication and characterization of polymeric aerogels loaded with diamond scattering particles

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https://opg.optica.org/ao/fulltext.cfm?uri=ao-63-22-6036&id=554136

Permanent Link

https://doi.org/10.1364/AO.527362
 http://hdl.handle.net/11603/31679

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection

Author/Creator

Author/Creator ORCID

https://orcid.org/0000-0001-9238-4918

Date

2024-07-31

Type of Work

journal articles
Text

Department

Program

Citation of Original Publication

Barlis, Alyssa, Haiquan Guo, Kyle Helson, Charles Bennett, Carol Yan Yan Chan, Tobias Marriage, Manuel Quijada, et al. “Fabrication and Characterization of Optical Filters from Polymeric Aerogels Loaded with Diamond Scattering Particles.” Applied Optics 63, no. 22 (August 1, 2024): 6036–45. https://doi.org/10.1364/AO.527362.

Rights

This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
PDM 1.0 DEED Public Domain Mark 1.0 Universal

Subjects

Abstract

We have developed a suite of infrared-blocking filters made by embedding diamond scattering particles in a polyimide aerogel substrate. We demonstrate the ability to tune the spectral performance of the filters based on both the composition of the base aerogel material and the properties of the scattering particles. We summarize the fabrication, optical modeling, and characterization of these filters. We investigate two polyimide base aerogel formulations and the effects of loading them with diamond scattering particles of varying sizes and relative densities. We describe a model for the filters’ behavior using a combination of Maxwell Garnett and Mie scattering techniques. We present optical characterization results for diamond-loaded aerogel filters with cutoff frequencies (50% transmittance) ranging between 2.5 and 15 THz, and confirm that the measured spectral performance is in agreement with our optical models. We also measure the filters’ refractive indices in the microwave and report findings in agreement with Maxwell Garnett model predictions (typically n < 1.08)