From Event: SPIE Optical Engineering + Applications, 2017
Infrared (IR) sensing technologies and systems operating from the near-infrared (NIR) to long-wave infrared (LWIR)
spectra are being developed for a variety of defense and commercial systems applications. Reflection losses affecting a
significant portion of the incident signal limits the performance of IR sensing systems. One of the critical technologies that
will overcome this limitation and enhance the performance of IR sensing systems is the development of advanced
antireflection (AR) coatings. Magnolia is actively involved in the development and advancement of ultrahigh performance
AR coatings for a wide variety of defense and commercial applications. Ultrahigh performance nanostructured AR
coatings have been demonstrated for UV to LWIR spectral bands using various substrates. The AR coatings enhance the
optical transmission through optical components and devices by significantly minimizing reflection losses, a substantial
improvement over conventional thin-film AR coating technologies. Nanostructured AR coatings are fabricated using a
tunable self-assembly process on substrates that are transparent for a given spectrum of interest ranging from UV to LWIR.
The nanostructured multilayer structures have been designed, developed and optimized for various optoelectronic
applications. The optical properties of the AR-coated optical components and sensor substrates have been measured and
fine-tuned to achieve a predicted high level of performance of the coatings. In this paper, we review our latest work on
high quality nanostructure-based AR coatings, including recent efforts towards the development of nanostructured AR
coatings on IR-transparent substrates.
Gopal G. Pethuraja, John W. Zeller, Roger E. Welser, Harry Efstathiadis, Pradeep Haldar, Priyalal S. Wijewarnasuriya, Nibir K. Dhar, and Ashok K. Sood, "Development of nanostructured antireflection coatings for infrared technologies and applications," Proc. SPIE 10404, Infrared Sensors, Devices, and Applications VII, 104040S (Presented at SPIE Optical Engineering + Applications: August 10, 2017; Published: 19 September 2017); https://doi.org/10.1117/12.2277957.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon