Volumetric Metaoptics for Compact and Low-Power Spectroscopy

Spectroscopy is a critical technology for remote sensing, but realizing compact low-power spectrometers remains challenging. Moreover, there is an obvious need of low-power, low-mass, and low-volume medium spectral resolution spectrometers for a variety of space-based instruments. This work combines...

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Bibliographic Details
Published in2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) pp. 1 - 2
Main Authors Ballew, Conner, Berkel, Sven van, Khanal, Subash, Chattopadhyay, Goutam
Format Conference Proceeding
LanguageEnglish
Published IEEE 28.08.2022
Subjects
Broadband communication
Detectors
Fabry-Perot
Instruments
Silicon
Silicon compounds
Spectroscopy
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Summary:Spectroscopy is a critical technology for remote sensing, but realizing compact low-power spectrometers remains challenging. Moreover, there is an obvious need of low-power, low-mass, and low-volume medium spectral resolution spectrometers for a variety of space-based instruments. This work combines a high-Q Fabry-Perot resonator with an inverse-designed, volumetric metaoptics device made of stacked Si layers to form a highly compact, low-power, and broadband spectrometer. The resonator consists of two distributed Bragg reflectors made of cascaded Silicon membranes, each curved by an SiO 2 thin film to support small mode volume resonances. The metaoptics separate the various resonances (spectrally separated by the free-spectral range of the cavity) to their own direct detector.
ISSN:2162-2035
DOI:10.1109/IRMMW-THz50927.2022.9895578