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Layered Nanostructures for Broadband Antireflectivity

Award Information
Agency: Department of Defense
Branch: Army
Contract: W909MY-20-P-0032
Agency Tracking Number: A201-045-1027
Amount: $11,496.75
Phase: Phase I
Program: SBIR
Solicitation Topic Code: A20-045
Solicitation Number: 20.1
Solicitation Year: 2020
Award Year: 2020
Award Start Date (Proposal Award Date): 2020-06-19
Award End Date (Contract End Date): 2021-02-13
Small Business Information
44 Hunt Street
Watertown, MA 02472-1111
United States
DUNS: 073804411
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Bipin Singh
 (617) 744-8848
Business Contact
 Martin Waters
Title: Mwatersrmd
Phone: (617) 668-6851
Research Institution

US Army sensor systems are complex optical instrumentation incorporating complex optical designs with multiple optical surfaces. To enhance the performance of such systems, it is critical to minimize reflections from the optical surfaces and enhance light transmission. Multi-layer anti-reflection coatings (ML-ARCs) are widely used in such optical systems to address this issue. Although well-designed ML-ARCs perform well, obtaining broadband anti-reflectivity for 3 µm–12 µm for large angles of incidence and polarization-insensitivity in a cost-effective manner is challenging. However, ARCs based on nanostructured arrays (NSAs) offer broadband, omnidirectional, and polarization-insensitive anti-reflectivity and also provide additional benefits such as anti-fogging. During Phase I, we propose to identify strategies for fabricating NSAs, and then demonstrate the feasibility of fabricating NSAs exhibiting broadband anti-reflectivity for large angles of incidence. Nanoparticles of the specified IR lensing materials will be fabricated. The size of the nanoparticles will be varied to obtain optimum performance. A bottoms-up fabrication technique will then be used to produce layered NSAs. The optical performance of these NSAs will be thoroughly evaluated for incidence angles up to 60°, and the reflectivity will be quantified. We will also investigate the nanoimprinting of gradient-index nanostructures for the proposed application.

* Information listed above is at the time of submission. *

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