Broadband infrared light source by simultaneous parametric down-conversion

Spontaneous parametric down-conversion is an essential tool for a quantum light source in the infrared region ranging 2–5 µm for the purpose of material identification, chemical analysis, and gas sensing. So far, photon pairs from the process in a nonlinear crystal have low tunability and a narrow s...

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Bibliographic Details
Published inScientific reports Vol. 11; no. 1; pp. 17986 - 8
Main Authors Hojo, Masayuki, Tanaka, Koichiro
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 09.09.2021
Nature Publishing Group
Nature Portfolio
Subjects
639/624/1020
639/624/400/482
Chemical analysis
Humanities and Social Sciences
Infrared spectroscopy
Light
Light sources
Lithium
multidisciplinary
Radiation
Science
Science (multidisciplinary)
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Summary:Spontaneous parametric down-conversion is an essential tool for a quantum light source in the infrared region ranging 2–5 µm for the purpose of material identification, chemical analysis, and gas sensing. So far, photon pairs from the process in a nonlinear crystal have low tunability and a narrow spectral range because of the phase-matching condition. Here, we propose a novel type of spontaneous parametric down-conversion processes that overcomes these challenges, where two photon pairs are simultaneously produced in the visible and infrared regions in periodically poled stoichiometric lithium tantalite. It allows broadband and tunable generation of infrared photon pairs that can be employed as an alternative light source for quantum infrared spectroscopy.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-97531-w