Broadband Optical Cooling Of Alh+ To The Rotational Ground State

Seck, Christopher M.

Permalink

https://hdl.handle.net/2142/51171 Copy

Description

Title

Broadband Optical Cooling Of Alh+ To The Rotational Ground State

Author(s)

Seck, Christopher M.

Contributor(s)

• Odom, Brian C.
• Lien, Chien-Yu

Issue Date

2014-06-19

Keyword(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).

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/51171

DOI

https://doi.org/10.15278/isms.2014.RH10

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

Owning Collections