Optical gain in rotationally excited nitrogen molecular ions

Persistent Link:
http://hdl.handle.net/10150/626190
Title:
Optical gain in rotationally excited nitrogen molecular ions
Author:
Azarm, Ali; Corkum, Paul; Polynkin, Pavel
Affiliation:
Univ Arizona, Coll Opt Sci
Issue Date:
2017-11-07
Publisher:
AMER PHYSICAL SOC
Citation:
Optical gain in rotationally excited nitrogen molecular ions 2017, 96 (5) Physical Review A
Journal:
Physical Review A
Rights:
©2017 American Physical Society
Collection Information:
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
Abstract:
We pump low-pressure nitrogen gas with ionizing femtosecond laser pulses at 1.5 mu m wavelength. The resulting rotationally excited N-2(+) 2 molecular ions generate directional, forward-propagating stimulated and isotropic spontaneous emissions at 428 nmwavelength. Through high-resolution spectroscopy of these emissions, we quantify rotational population distributions in the upper and lower emission levels. We show that these distributions are shifted with respect to each other, which has a strong influence on the transient optical gain in this system. Although we find that electronic population inversion exists in our particular experiment, we show that sufficient dissimilarity of rotational distributions in the upper and lower emission levels could, in principle, lead to gain without net electronic population inversion.
ISSN:
2469-9926; 2469-9934
DOI:
10.1103/PhysRevA.96.051401
Version:
Final published version
Sponsors:
U.S. Air Force Office of Scientific Research under MURI Award [FA9550-16-1-0013]
Additional Links:
https://link.aps.org/doi/10.1103/PhysRevA.96.051401

Full metadata record

DC FieldValue Language
dc.contributor.authorAzarm, Alien
dc.contributor.authorCorkum, Paulen
dc.contributor.authorPolynkin, Pavelen
dc.date.accessioned2017-12-05T16:03:05Z-
dc.date.available2017-12-05T16:03:05Z-
dc.date.issued2017-11-07-
dc.identifier.citationOptical gain in rotationally excited nitrogen molecular ions 2017, 96 (5) Physical Review Aen
dc.identifier.issn2469-9926-
dc.identifier.issn2469-9934-
dc.identifier.doi10.1103/PhysRevA.96.051401-
dc.identifier.urihttp://hdl.handle.net/10150/626190-
dc.description.abstractWe pump low-pressure nitrogen gas with ionizing femtosecond laser pulses at 1.5 mu m wavelength. The resulting rotationally excited N-2(+) 2 molecular ions generate directional, forward-propagating stimulated and isotropic spontaneous emissions at 428 nmwavelength. Through high-resolution spectroscopy of these emissions, we quantify rotational population distributions in the upper and lower emission levels. We show that these distributions are shifted with respect to each other, which has a strong influence on the transient optical gain in this system. Although we find that electronic population inversion exists in our particular experiment, we show that sufficient dissimilarity of rotational distributions in the upper and lower emission levels could, in principle, lead to gain without net electronic population inversion.en
dc.description.sponsorshipU.S. Air Force Office of Scientific Research under MURI Award [FA9550-16-1-0013]en
dc.language.isoenen
dc.publisherAMER PHYSICAL SOCen
dc.relation.urlhttps://link.aps.org/doi/10.1103/PhysRevA.96.051401en
dc.rights©2017 American Physical Societyen
dc.titleOptical gain in rotationally excited nitrogen molecular ionsen
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Coll Opt Scien
dc.identifier.journalPhysical Review Aen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
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