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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 13 — Jun. 22, 2009
  • pp: 10706–10717

Multistage optical Stark decelerator for a pulsed supersonic beam with a quasi-cw optical lattice

Yaling Yin, Qi Zhou, Lianzhong Deng, Yong Xia, and Jianping Yin  »View Author Affiliations

Optics Express, Vol. 17, Issue 13, pp. 10706-10717 (2009)

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We propose a new scheme to realize a multistage optical Stark deceleration for a supersonic molecular beam using a time-varying red-detuned quasi-cw optical lattice with a length of up to 10mm. We analyze the motion of the slowed molecules inside the optical decelerator, and study the dependences of the velocity of the slowed molecular packet on the synchronous phase angle and the number of the deceleration stages (i.e., the number of the optical-lattice cells) by using Monte-Carlo method. Our study shows that the proposed optical Stark decelerator cannot only efficiently slow a pulsed supersonic beam from 230m/s to zero (standstill), but also obtain an ultracold molecular packet with a temperature of sub-mK due to bunching effect in the multistage optical Stark decelerator, which can be trapped in the optical lattice by rapidly turning off the modulation signal of the lattice. Also, we compare the decelerated results of our multistage optical Stark decelerator with a single-stage optical one, and find that our scheme cannot only obtain a colder molecular packet under the same molecular-beam parameters and deceleration conditions, but also be directly used to trap the slowed cold molecules after the deceleration, while don’t need to use another molecular trap.

© 2009 Optical Society of America

OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.6580) Atomic and molecular physics : Stark effect
(020.7010) Atomic and molecular physics : Laser trapping

ToC Category:
Atomic and Molecular Physics

Original Manuscript: April 9, 2009
Revised Manuscript: May 25, 2009
Manuscript Accepted: May 25, 2009
Published: June 11, 2009

Yaling Yin, Qi Zhou, Lianzhong Deng, Yong Xia, and Jianping Yin, "Multistage optical Stark decelerator for a pulsed supersonic beam with a quasi-cw optical lattice," Opt. Express 17, 10706-10717 (2009)

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