Laser cooling of thulium atoms Academic Article uri icon

abstract

  • We demonstrated laser cooling and trapping of thulium atoms at sub-Doppler temperatures in a magneto-optical trap (MOT). Up to 3 10 6 thulium atoms were trapped in the MOT at temperatures down to 25(5) K which is approximately 10 times lower than the Doppler limit. The lifetime of atoms in the MOT varied between 0.3-1.5 s and was restricted mostly by optical leaks from the upper cooling level. The lower limit for the leaking rate was estimated to be 22(6) s -1 . Due to a big magnetic moment of Tm atoms, a part of them were trapped in a magnetic trap from the quadrupole field of the MOT. We observed about 3 10 4 purely magnetically trapped atoms at temperature of 25 K with a lifetime in the trap of 0.5 s. Also we set up a "dark" MOT consisting of six crossed hollow beams which increased the number of trapped atoms by a factor of 5 leading to 1.5 10 7 atoms at the expense of higher temperature. Pleiades Publishing, Ltd., 2011.

published proceedings

  • Optics and Spectroscopy

author list (cited authors)

  • Sukachev, D., Chebakov, K., Sokolov, A., Akimov, A., Kolachevsky, N., & Sorokin, V.

citation count

  • 5

complete list of authors

  • Sukachev, D||Chebakov, K||Sokolov, A||Akimov, A||Kolachevsky, N||Sorokin, V

publication date

  • October 2011