Laser cooling and slowing of CaF molecules
作者： V. Zhelyazkova , A. Cournol , T. E. Wall , A. Matsushima , J. J. Hudson
DOI: 10.1103/PHYSREVA.89.053416
关键词: Electron 、 Laser light 、 Fixed frequency 、 Lattice (order) 、 Supersonic speed 、 Chirp 、 Atomic physics 、 Molecule 、 Engineering physics 、 Physics 、 Laser cooling
摘要: We demonstrate slowing and longitudinal cooling of a supersonic beam of CaF molecules using counterpropagating laser light resonant with a closed rotational and almost-closed vibrational transition. A group of molecules are decelerated by about 20 m/s by applying light of a fixed frequency for 1.8 ms. Their velocity spread is reduced, corresponding to a final temperature of about 300 mK. The velocity is further reduced by chirping the frequency of the light to keep it in resonance as the molecules slow down.
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