Pulsed polarization gradient cooling in an optical dipole trap with a Laguerre-Gaussian laser beam

  • Y. Torii
  • N. Shiokawa
  • T. Hirano
  • T. Kuga
  • Y. Shimizu
  • H. Sasada

DOI: 10.1007/s100530050088

Cite this article as:
Torii, Y., Shiokawa, N., Hirano, T. et al. Eur. Phys. J. D (1998) 1: 239. doi:10.1007/s100530050088

Abstract:

We utilized a blue-detuned Laguerre-Gaussian (doughnut) laser beam to trap cold rubidium atoms by optical dipole force. ”Pulsed” polarization gradient cooling was applied to the trapped atoms to suppress the trap loss due to heating caused by random photon scattering of the trapping light. In this trap about 108 atoms were initially captured and the trap lifetime was 1.5 s, which was consistent with losses due to background gas collisions. This trap can readily be applied to atom guiding, compression, and evaporative cooling.

PACS. 32.80.Pj Optical cooling of atoms; trapping - 39.90.+d Other instrumentation and techniques for atomic and molecular physics 

Copyright information

© EDP Sciences, Springer-Verlag 1998

Authors and Affiliations

  • Y. Torii
    • 1
  • N. Shiokawa
    • 1
  • T. Hirano
    • 1
  • T. Kuga
    • 1
  • Y. Shimizu
    • 2
  • H. Sasada
    • 2
  1. 1.Institute of Physics, University of Tokyo, 3-8-1 Komaba, Meguro-ku Tokyo 153, JapanJP
  2. 2.Department of Physics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223, JapanJP