Cerjan, BenjaminHalas, Naomi J.2019-08-162019-08-162019Cerjan, Benjamin and Halas, Naomi J.. "Toward a Nanophotonic Nose: A Compressive Sensing-Enhanced, Optoelectronic Mid-Infrared Spectrometer." <i>ACS Photonics,</i> 6, no. 1 (2019) American Chemical Society: 79-86. https://doi.org/10.1021/acsphotonics.8b01503.https://hdl.handle.net/1911/106251Infrared (IR) spectroscopy has been a central tool for chemical analysis for decades, useful in a wide range of fields for the detection and quantification of molecules based on their unique vibrational resonances. Conventional IR spectroscopy relies on bulky, dispersive optics, however, making portability and miniaturization a substantial challenge. Here we demonstrate a micron-scale IR spectrometer where spectrally selective detection is performed optoelectronically based on the wavelength-dependent mid-IR photocurrent responses of an array of Al grating-based detectors fabricated on a doped Si substrate. Compressive sensing techniques extend our resolution, enabling spectral features to be identified with a remarkably small number of detectors. This work demonstrates a CMOS-compatible, readily scalable approach for the fabrication of compact, room-temperature IR spectrometers capable of use in fieldable applications.engThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.Journal articlespectroscopyinfraredcompressive sensingaluminumsuper-resolutionminiaturehttps://doi.org/10.1021/acsphotonics.8b01503