Optical Stark deceleration of neutral molecules from supersonic expansion with a rotating laser beam
Optical Stark deceleration of neutral molecules from supersonic expansion with a rotating laser beam
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利用旋转激光束对超音速膨胀中性分子进行光学斯塔克减速
DOI：
10.1088/1674-1056/27/5/053701
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发表时间：
2018-05
期刊：
影响因子：
--
通讯作者：
Lianzhong Deng
中科院分区：
文献类型：
--
作者：
Yongcheng Yang;Shunyong Hou;Lianzhong Deng
冷分子在高分辨率光谱学、物理常数精密测量、冷碰撞、冷化学等方面具有重要的科学意义。超声速膨胀是制备高动能冷分子的常用方法。我们在这里从理论上表明，快速运动的分子从超音速膨胀可以有效地减速到任何所需的速度与旋转激光束。红色失谐激光的轨道聚焦光斑作为分子的二维势阱。我们分析了减速势阱内分子的动力学，并研究了它们被势阱接受的相位与激光束倾斜角的关系。采用ND - 3分子对该方案进行了试验，并利用蒙特卡罗方法对其在减速势井作用下的运动轨迹进行了数值模拟。例如，用功率为20千瓦的激光束聚焦在一罐
Cold molecules have great scientific significance in high-resolution spectroscopy, precision measurement of physical constants, cold collision, and cold chemistry. Supersonic expansion is a conventional and versatile method to produce cold molecules with high kinetic energies. We theoretically show here that fast-moving molecules from supersonic expansion can be effectively decelerated to any desired velocity with a rotating laser beam. The orbiting focus spot of the red-detuned laser serves as a two-dimensional potential well for the molecules. We analyze the dynamics of the molecules inside the decelerating potential well and investigate the dependence of their phase acceptance by the potential well on the tilting angle of the laser beam. ND 3 molecules are used in the test of the scheme and their trajectories under the impact of the decelerating potential well are numerically simulated using the Monte Carlo method. For instance, with a laser beam of 20 kW in power focused into a pot of
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