Pixelated resonant subwavelength grating filters for greenhouse gas monitoring

David W. Peters; Shanalyn A. Kemme; Alvaro A. Cruz-Cabrera; Robert R. Boye; Chad A. Bustard

doi:10.1117/12.873932

17 January 2011 Pixelated resonant subwavelength grating filters for greenhouse gas monitoring

David W. Peters, Shanalyn A. Kemme, Alvaro A. Cruz-Cabrera, Robert R. Boye, Chad A. Bustard

Proceedings Volume 7941, Integrated Optics: Devices, Materials, and Technologies XV; 794113 (2011) https://doi.org/10.1117/12.873932
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

We describe the design of pixelated filter arrays for hyperspectral monitoring of CO₂ and H₂O absorption in the midwave infrared (centered at 4.25μm and 5.15μm, respectively) using resonant subwavelength gratings (RSGs), also called guided-mode resonant filters (GMRFs). For each gas, a hyperspectral filter array of very narrowband filters is designed that spans the absorption band on a single substrate. A pixelated geometry allows for direct registration of filter pixels to focal plane array (FPA) sensor pixels and for non-scanning data collection. The design process for narrowband, low-sideband reflective and transmissive filters within fabrication limitations will be discussed.

Citation Download Citation

David W. Peters, Shanalyn A. Kemme, Alvaro A. Cruz-Cabrera, Robert R. Boye, and Chad A. Bustard "Pixelated resonant subwavelength grating filters for greenhouse gas monitoring", Proc. SPIE 7941, Integrated Optics: Devices, Materials, and Technologies XV, 794113 (17 January 2011); https://doi.org/10.1117/12.873932

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