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13 December 2020 Integrated photonic correlation spectroscopy for faint exoplanet biosignature detection
Ross Cheriton, Adam Densmore, Suresh Sivanandam, Ernst de Mooij, Daniele Melati, Mohsen Kamandar Dezfouli, Jens H. Schmid, Jean Lapointe, Shurui Wang, Rubin Ma, Dan-Xia Xu, Luc Simard, Siegfried Janz
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Proceedings Volume 11446, Optical and Infrared Interferometry and Imaging VII; 114461T (2020) https://doi.org/10.1117/12.2560811
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only
Abstract
Exoplanetary biosignatures, molecular compounds which indicate a likelihood of extraterrestrial life, can be detected by highly sensitive spectroscopy of starlight which passes through the atmospheres of exoplanets towards the Earth. Such sensitive measurements can only be accomplished with the next generation of telescopes, leading to a corresponding increase in cost and complexity spectrometers. Integrated astrophotonic instruments are well-suited to address these challenges through their low-cost fabrication and compact geometries. We propose and characterize an integrated photonic gas sensor which detects the correlation between the near-infrared quasi-periodic vibronic absorption line spectrum of a gas and a silicon waveguide ring resonator transmittance comb. This technique enables lock-in amplification detection for real-time detection of faint biosignatures for reduced observation timescales and rapid exoplanetary atmosphere surveys using highly compact instrumentation.
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Ross Cheriton, Adam Densmore, Suresh Sivanandam, Ernst de Mooij, Daniele Melati, Mohsen Kamandar Dezfouli, Jens H. Schmid, Jean Lapointe, Shurui Wang, Rubin Ma, Dan-Xia Xu, Luc Simard, and Siegfried Janz "Integrated photonic correlation spectroscopy for faint exoplanet biosignature detection", Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 114461T (13 December 2020); https://doi.org/10.1117/12.2560811
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KEYWORDS
Exoplanets
Spectroscopy
Absorption
Integrated photonics
Resonators
Carbon dioxide
Earth's atmosphere
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