Multistage optical Stark decelerator for a pulsed supersonic beam with a quasi-cw optical lattice

摘要: We propose a new scheme to realize multistage optical Stark deceleration for supersonic molecular beam using time-varying red-detuned quasi-cw lattice with length of up 10 mm. analyze the motion slowed molecules inside decelerator, and study dependences velocity packet on synchronous phase angle number stages (i.e., optical-lattice cells) by Monte-Carlo method. Our shows that proposed decelerator cannot only efficiently slow pulsed from 230 m/s zero (standstill), but also obtain an ultracold temperature sub-mK due bunching effect in which can be trapped rapidly turning off modulation signal lattice. Also, we compare decelerated results our single-stage one, find colder under same molecular-beam parameters conditions, directly used trap cold after deceleration, while don't need use another trap.