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 Title: Broadband Optical Cooling Of Alh+ To The Rotational Ground State Author(s): Seck, Christopher M. Contributor(s): Odom, Brian C.; Lien, Chien-Yu Subject(s): Cold/Ultra-cold/Physics Abstract: We demonstrate that a single spectrally filtered femtosecond laser, tuned to the electronic A-X transition of trapped AlH$^{+}$, can efficiently cool rotations from room temperature to the ground state. The nearly diagonal Franck-Condon-Factors between the electronic X and A states create semi-closed cycling transitions between the vibrational ground states of the X and A states. Parity-preserving electronic cycling cools to the two lowest rotational levels with a 10 $\mu$s timescale set by repeated electronic relaxation, and collection into the lowest rotational level relies upon a slower vibrational relaxation event setting the overall cooling timescale to 140 ms. The population distribution among the rotational levels is detected by $(1+1’)$ resonance-enhanced multiphoton dissociation (REMPD) and time-of-flight mass-spectrometry (TOFMS). Issue Date: 2014-06-19 Publisher: International Symposium on Molecular Spectroscopy Citation Info: Seck, C.M.; Odom, B.C.; Lien, C. BROADBAND OPTICAL COOLING OF AlH+ TO THE ROTATIONAL GROUND STATE. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.RH10 Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/51171 DOI: https://doi.org/10.15278/isms.2014.RH10 Rights Information: Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Date Available in IDEALS: 2014-09-172015-04-14
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