Atomic (or molecular) guiding using a blue-detuned doughnut mode in a hollow metallic waveguide.
Atomic (or molecular) guiding using a blue-detuned doughnut mode in a hollow metallic waveguide.
复制标题
DOI：
10.1364/opex.13.008406
复制
发表时间：
2005-10
期刊：
影响因子：
3.8
通讯作者：
Zhengling Wang;Meng Dai;J. Yin
中科院分区：
文献类型：
--
作者：
Zhengling Wang;Meng Dai;J. Yin
提出了一种利用蓝失谐TE（01）圆环模在空心金属波导中引导冷原子（或分子）的新方案，并分析了空心金属波导中各模的电磁场分布.利用缀饰原子方法计算了三能级原子TE（01）甜甜圈模的光学势，发现TE（01）模的光学势足够高，可以引导从标准磁光阱中释放出来的冷原子.研究表明，当输入激光功率为0.5W，失谐量为3GHz时，冷原子在空心半径为15 μ m的直腔高分子量波导中的导引效率可达98%，当弯曲高分子量波导的曲率半径R > 2cm时，导引效率几乎不随曲率半径R的变化而变化。这是进行原子光学实验或实现具有任意图案的计算机控制原子光刻的理想方案。我们还分析了高分子量分子中被引导原子由于自发辐射和背景热碰撞所造成的损失，并简要讨论了我们的引导方案在原子和分子光学中的一些潜在应用。
We propose a new scheme to guide cold atoms (or molecules) using a blue-detuned TE(01) doughnut mode in a hollow metallic waveguide (HMW), and analyze the electromagnetic field distributions of various modes in the HMW. We calculate the optical potentials of the TE(01) doughnut mode for three-level atoms using dressed-atom approach, and find that the optical potential of the TE(01) mode is high enough to guide cold atoms released from a standard magneto-optical trap. Our study shows that when the input laser power is 0.5W and its detuning is 3GHz, the guiding efficiency of cold atoms in the straight HMW with a hollow radius of 15 microm can reach 98%, and this guiding efficiency will be almost unchanged with the change of curvature radius R of the bent HMW as R > 2cm, which is a desirable scheme to do some atom-optics experiments or realize a computer-controlled atom lithography with an arbitrary pattern. We also analyze the losses of the guided atoms in the HMW due to the spontaneous emission and background thermal collisions and briefly discuss some potential applications of our guiding scheme in atom and molecule optics.