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Published on: December 27, 2012
Resonant Anti-Reflection Metasurfaces for Infrared Transmission Optics
John Brewer1, Sachin Kulkarni1, Aaswath P Raman1
1Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States of America.
None:
A fundamental capability needed for any transmissive optical component is anti-reflection, yet this capability can be challenging to achieve in a cost-effective manner over longer infrared wavelengths. We demonstrate that Mie-resonant photonic structures can enable high transmission through a high-index optical component, allowing it to function effectively over long-wavelength infrared wavelengths. Using silicon as a model system, we demonstrate a resonant metasurface that enables a window optic with transmission up to 40% greater than that of unpatterned Si. Imaging comparisons with unpatterned Si and off-the-shelf germanium optics are shown as well as modulation transfer function measurements, showing excellent performance and suitability for imaging applications. Our results show how resonant photonic structures can be used to improve optical transmission through high-index optical components and highlight their possible use in infrared imaging applications.
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