Prospects for Doppler cooling of three-electronic-level molecules

Details Prospects for Doppler cooling of three-electronic-level molecules Prospects for Doppler cooling of three-electronic-level molecules

2010-12-16

arxiv.org/abs/1012.3696v4

Phys. Rev. A 83, 053404 (2011)

Physics

Atomic Physics

7 pages, 7 figures

Scientific paper

10.1103/PhysRevA.83.053404

Analogous to the extension of laser cooling techniques from two-level to three-level atoms, Doppler cooling of molecules with an intermediate electronic state is considered. In particular, we use a rate-equation approach to simulate cooling of SiO+, in which population buildup in the intermediate state is prevented by its short lifetime. We determine that Doppler cooling of SiO+ can be accomplished without optically repumping from the intermediate state, at the cost of causing undesirable parity flips and rotational diffusion. Since the necessary repumping would require a large number of continuous-wave lasers, optical pulse shaping of a femtosecond laser is proposed as an attractive alternative. Other candidate three-electron-level molecules are also discussed.

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