Rotational State Microwave Mixing for Laser Cooling of Complex Diatomic Molecules

We demonstrate the mixing of rotational states in the ground electronic state using microwave radiation to enhance optical cycling in the molecule yttrium (II) monoxide (YO). This mixing technique is used in conjunction with a frequency modulated and chirped continuous wave laser to slow longitudina...

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Bibliographic Details
Published in:Physical review letters 2015-06, Vol.114 (22), p.223003-223003, Article 223003
Main Authors: Yeo, Mark, Hummon, Matthew T, Collopy, Alejandra L, Yan, Bo, Hemmerling, Boerge, Chae, Eunmi, Doyle, John M, Ye, Jun
Format: Article
Language:English
Subjects:
Beams (radiation)
Channels
Diatomic molecules
Flux
Laser cooling
Microwaves
Rotational states
Three dimensional
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Summary:We demonstrate the mixing of rotational states in the ground electronic state using microwave radiation to enhance optical cycling in the molecule yttrium (II) monoxide (YO). This mixing technique is used in conjunction with a frequency modulated and chirped continuous wave laser to slow longitudinally a cryogenic buffer-gas beam of YO. We generate a flux of YO below 10 m/s, directly loadable into a three-dimensional magneto-optical trap. This technique opens the door for laser cooling of diatomic molecules with more complex loss channels due to intermediate states.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.114.223003