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Magneto-optical trapping of diatomic...

Norrgard, Eric B.

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Magneto-optical trapping of diatomic molecules.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Magneto-optical trapping of diatomic molecules./
作者:	Norrgard, Eric B.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	347 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-12(E), Section: B.
Contained By:	Dissertation Abstracts International77-12B(E).
標題:	Molecular physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10157607
ISBN:	9781369126242

Magneto-optical trapping of diatomic molecules.
Norrgard, Eric B.

Magneto-optical trapping of diatomic molecules. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 347 p.

Source: Dissertation Abstracts International, Volume: 77-12(E), Section: B.

Thesis (Ph.D.)--Yale University, 2016.

Laser cooling in a magneto-optical trap (MOT) is the workhorse technique for atomic physics in the ultracold regime, serving as the starting point in applications from optical clocks to quantum-degenerate gases. It was recently shown that optical cycling, and thus laser cooling, should be possible for a class of at least 40 molecular species, using just three (or fewer) lasers. In this work, we demonstrate the first laser slowing and first magneto-optical trapping of a molecule, strontium monofluoride (SrF).

ISBN: 9781369126242Subjects--Topical Terms:

3174737
Molecular physics.

Magneto-optical trapping of diatomic molecules.
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520 $a Laser cooling in a magneto-optical trap (MOT) is the workhorse technique for atomic physics in the ultracold regime, serving as the starting point in applications from optical clocks to quantum-degenerate gases. It was recently shown that optical cycling, and thus laser cooling, should be possible for a class of at least 40 molecular species, using just three (or fewer) lasers. In this work, we demonstrate the first laser slowing and first magneto-optical trapping of a molecule, strontium monofluoride (SrF).
520 $a In our experiments, a laser-slowed molecular beam is used to load a MOT. The rotational structure in molecules prevents cycling on a two-level system (as is typical with atoms) and leads to populating states which are dark to the confining laser. In the first molecular MOT demonstration, the confining forces were very weak compared to typical atomic MOTs. In a second iteration, with the aid of recent theoretical insights into the origin of the restoring force in a MOT, we optimized the confining force for static fields in the MOT in lieu of the dark states. We then demonstrated a trap which eliminates dark states by trapping in time-varying fields. This method allows for capture of a large sample of molecules at ultracold temperatures and high phase space densities with long trap lifetimes. The trapped population is sufficiently cold to proceed with many proposed experiments posed to expand the frontiers of knowledge, such as operation of molecular fountains and study of ultracold molecule-atom collisions.
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