Volume 17, Issue 22 pp. 3641-3648
Article

Proposal for Laser Cooling of Complex Polyatomic Molecules

Ivan Kozyryev

Corresponding Author

Ivan Kozyryev

Harvard-MIT Center for Ultracold Atoms, Cambridge, MA, 02138 USA

Department of Physics, Harvard University, Cambridge, MA, 02138 USA

Search for more papers by this author
Louis Baum

Louis Baum

Harvard-MIT Center for Ultracold Atoms, Cambridge, MA, 02138 USA

Department of Physics, Harvard University, Cambridge, MA, 02138 USA

Search for more papers by this author
Kyle Matsuda

Kyle Matsuda

Harvard-MIT Center for Ultracold Atoms, Cambridge, MA, 02138 USA

Department of Physics, Harvard University, Cambridge, MA, 02138 USA

Search for more papers by this author
Prof. John M. Doyle

Prof. John M. Doyle

Harvard-MIT Center for Ultracold Atoms, Cambridge, MA, 02138 USA

Department of Physics, Harvard University, Cambridge, MA, 02138 USA

Search for more papers by this author
First published: 19 October 2016
Citations: 94

Graphical Abstract

Cooling MORe molecules: An experimentally feasible strategy for direct laser cooling, to micro-kelvin temperatures, of alkaline earth monoalkoxide (MOR) polyatomic molecules with six or more atoms is presented. Our approach relies on the attachment of a metal atom to a complex molecule, where it acts as an active photon cycling site (see picture).

Abstract

An experimentally feasible strategy for direct laser cooling of polyatomic molecules with six or more atoms is presented. Our approach relies on the attachment of a metal atom to a complex molecule, where it acts as an active photon cycling site. We describe a laser cooling scheme for alkaline earth monoalkoxide free radicals taking advantage of the phase space compression of a cryogenic buffer-gas beam. Possible applications are presented including laser cooling of chiral molecules and slowing of molecular beams using coherent photon processes.