Manipulating the motion of polar molecules with microwave radiation

  • Merz S
  • Brieger C
  • Vanhaecke N
 et al. 
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Microwave radiation coupled into a cylindrically symmetric resonator is used to focus, guide, decelerate, and accelerate ammonia molecules in high-field-seeking states. In a first series of measurements, we demonstrate that the focal length of a microwave lens is directly proportional to the molecules velocity and to the inverse of the fourth root of the microwave power. In a second series of measurements employing a modified set-up, we use a multi-stage decelerator exploiting the TE1,1,12 mode of a cylindrical resonator and various switching schemes. We can deliberately choose between spatial focusing and velocity focusing while guiding, and we demonstrate kinetic energy reduction by as much as 30% of a 12 m/s slow packet of molecules utilising the 12 deceleration stages. © 2013 Taylor & Francis.

Author-supplied keywords

  • ac Stark effect
  • cold molecules
  • microwave deceleration

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  • Simon Merz

  • Claudia Brieger

  • Nicolas Vanhaecke

  • Gerard Meijer

  • Melanie Schnell

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