Development of nanostructured antireflection coating technology for IR band for improved detector performance

Ashok K. Sood; John W. Zeller; Adam W. Sood; Roger E. Welser; Parminder Ghuman; Sachidananda Babu; Sarath Gunapala; Alexander Soibel; David Ting; Latika S. Chaudhary; Harry Efstathiadis

doi:10.1117/12.2598994

15 September 2021 Development of nanostructured antireflection coating technology for IR band for improved detector performance

Ashok K. Sood, John W. Zeller, Adam W. Sood, Roger E. Welser, Parminder Ghuman, Sachidananda Babu, Sarath Gunapala, Alexander Soibel, David Ting, Latika S. Chaudhary, Harry Efstathiadis

Author Affiliations +

Proceedings Volume 11858, Sensors, Systems, and Next-Generation Satellites XXV; 1185812 (2021) https://doi.org/10.1117/12.2598994
Event: SPIE Remote Sensing, 2021, Online Only

Abstract

Broadband antireflection (AR) optical coatings covering the ultraviolet (UV) to infrared (IR) spectral bands have many potential applications for various NASA systems. The performance of these systems is significantly limited by signal loss due to reflection off substrates and optical components. Tunable nanoengineered optical layers offer omnidirectional suppression of light reflection/scattering with increased optical transmission to enhance detector and system performance particularly over IR band wavelengths. Nanostructured AR coatings enable the realization of optimal AR coatings with high laser damage thresholds and reliability in extreme low temperature environments and under launch conditions for various NASA applications. We are developing and advancing high-performance AR coatings on GaSb and various other substrate types for spectral bands ranging from UV to LWIR. The nanostructured AR coatings enhance transmission of light through optical components and detector devices by greatly minimizing reflection losses over range of incidence angles, providing substantial improvements over more conventional thin film AR coating technologies. In this paper, we review our latest developments in high performance nanostructurebased AR coatings, focusing primarily on recent efforts in designing and fabricating AR coatings for the LWIR spectral band for performance improvements in airborne and space detector applications.

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Ashok K. Sood, John W. Zeller, Adam W. Sood, Roger E. Welser, Parminder Ghuman, Sachidananda Babu, Sarath Gunapala, Alexander Soibel, David Ting, Latika S. Chaudhary, and Harry Efstathiadis "Development of nanostructured antireflection coating technology for IR band for improved detector performance", Proc. SPIE 11858, Sensors, Systems, and Next-Generation Satellites XXV, 1185812 (15 September 2021); https://doi.org/10.1117/12.2598994

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