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Dong, G J
Publications (2 of 2) Show all publications
Dong, G. J., Lu, W. P., Barker, P. F. & Shneider, M. N. (2005). Cold molecules in pulsed optical lattices. Progress in Quantum Electronics, 29(1), 1-58
Open this publication in new window or tab >>Cold molecules in pulsed optical lattices
2005 (English)In: Progress in Quantum Electronics, ISSN 0079-6727, E-ISSN 1873-1627, Vol. 29, no 1, p. 1-58Article, review/survey (Refereed) Published
Abstract [en]

We review recent theoretical studies on the dynamics of molecules in pulsed optical lattices. These lattices are periodic potential wells formed by the interaction between two counter propagating far-off resonant optical fields and the molecules. We show that the molecules can be manipulated in both constant velocity and accelerating lattices for a number of applications. We first study a molecular optical mirror through the reflections of molecules by a stationary optical lattice and show that the reflectivity can be significantly improved by optimizing the pulse duration. When reflection occurs from a moving lattice, we show that molecules can brought to rest when the lattice velocity is half the molecular velocity, demonstrating a new and efficient method for creating slow cold molecules. We further describe a microlinear accelerator for molecules produced by an accelerating optical lattice, which is achieved by frequency chirping one of the two optical fields. The molecules trapped by the potential wells of the lattice are accelerated to high velocities (10-100km/s) over micron-size distance within nanosecond time scales. When the lattice is decelerated, the trapped molecules can be slowed to zero velocity, offering an alternate method for producing slow cold molecules. Molecules that are not trapped in the accelerating lattice can be temporarily localized around a characteristic velocity,. which is uniquely dependent on the mass-to-polarizability ratio. We show that this feature can be used for a new form of time-of-flight mass spectrometry for chemical analysis of a mixture.

ultracold molecules; optical lattice; dipole force; molecular optics; time-of-flight technique
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
urn:nbn:se:miun:diva-11869 (URN)10.1016/j.pquantelec.2004.12.001 (DOI)000227815500001 ()
Available from: 2010-07-16 Created: 2010-07-16 Last updated: 2017-12-12Bibliographically approved
Dong, G. J., Edvardsson, S., Lu, W. P. & Barker, P. F. (2005). Super-Gaussian mirror for high-field-seeking molecules. Physical Review A. Atomic, Molecular, and Optical Physics, 72(3)
Open this publication in new window or tab >>Super-Gaussian mirror for high-field-seeking molecules
2005 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 72, no 3Article in journal (Refereed) Published
Abstract [en]

A matter wave mirror using a single, pulsed, super-Gaussian (SG) optical beam for specular reflection of neutral ground-state molecules is studied. The mirror has a high reflectivity close to 100% and nearly perfect specular reflection over a large incident angle. This mirror avoids the usual problems due to surface roughness and the van der Waals interactions that occur in conventional atomic mirrors. Further, it is capable of reflectance and transmittance with applications to velocity filtering and deceleration of cold molecules.

National Category
Natural Sciences
urn:nbn:se:miun:diva-9801 (URN)10.1103/PhysRevA.72.031605 (DOI)000232228300012 ()
Available from: 2009-09-22 Created: 2009-09-22 Last updated: 2017-12-13Bibliographically approved

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