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Nanostructured Antireflection Coatings for Optical Detection and Sensing Applications

Published online by Cambridge University Press:  10 July 2015

Gopal G. Pethuraja ,
Roger E. Welser ,
John W. Zeller ,
Yash R. Puri ,
Ashok K. Sood ,
Harry Efstathiadis ,
Pradeep Haldar ,
Nibir K. Dhar  and
Priyalal Wijewarnasuriya
Gopal G. Pethuraja
Affiliation:
Magnolia Optical Technologies Inc., 52-B Cummings Park, Suite 314, Woburn, MA 01801 Energy and Environmental Technology Applications Center (E2TAC), College of Nanoscale Science and Engineering, Albany, NY 12203
Roger E. Welser
Affiliation:
Magnolia Optical Technologies Inc., 52-B Cummings Park, Suite 314, Woburn, MA 01801
John W. Zeller
Affiliation:
Magnolia Optical Technologies Inc., 52-B Cummings Park, Suite 314, Woburn, MA 01801
Yash R. Puri
Affiliation:
Magnolia Optical Technologies Inc., 52-B Cummings Park, Suite 314, Woburn, MA 01801
Ashok K. Sood
Affiliation:
Magnolia Optical Technologies Inc., 52-B Cummings Park, Suite 314, Woburn, MA 01801
Harry Efstathiadis
Affiliation:
Energy and Environmental Technology Applications Center (E2TAC), College of Nanoscale Science and Engineering, Albany, NY 12203
Pradeep Haldar
Affiliation:
Energy and Environmental Technology Applications Center (E2TAC), College of Nanoscale Science and Engineering, Albany, NY 12203
Nibir K. Dhar
Affiliation:
DARPA/MTO, 675 North Randolph Street, Arlington, VA 22203
Priyalal Wijewarnasuriya
Affiliation:
U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20783
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Abstract

Optical components such as lenses, glass windows, and prisms are subject to Fresnel reflection due to the mismatch between the refractive indices of the air and glass. An optical interface layer, i.e., antireflection (AR) layer, is needed to eliminate this unwanted reflection at the air/glass interface. Nanostructured broadband and wide-angle AR structures have been developed using a scalable self-assembly process. Ultra-high performance of the nanostructured AR coatings has been demonstrated on various substrates such as quartz, sapphire, polymer, and other materials typically employed in optical lenses. AR coatings on polycarbonate lead to optical transmittance enhancement from approximately 90% to almost 100% for the entire visible, and part of the near-infrared (NIR), band. The AR coatings have also been demonstrated on curved surfaces. AR coatings on n-BK7 lenses enable ultra-high light transmittance for the entire visible, and most of the NIR, spectrum. Nanostructured oxide layers with step-graded index profiles, deposited onto the optical elements of an optical system, can significantly increase sensitivity, and hence improve the overall performance of the system.

Keywords

nanostructureoptical propertiesself-assembly
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1805: Symposium SS/TT – Fabrication and Properties of Oxide Thin Films, Nanostructures and Interfaces for Advanced Applications , 2015 , mrss15-2137947
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

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