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Chinese Physics Letters

A Novel Mirror for Cold Molecules with a Semi-Gaussian Beam

尹亚玲, 周琦, Yong Xia, 印建平

Published Jan 1, 2008• 0 citations
OpenAlex

Abstract

我们建议一面新奇镜子因为有蓝去谐的 semi-Gaussian 的冷分子微笑并且由蒙特卡罗模拟学习冷分子的动态思考过程。我们的学习证明这面镜子能认识到冷碘的镜子的思考有由 58.2% 的反射率的 30 mK 的温度的分子的横梁当 semi-Gaussian 激光力量是 1.0kW 时。当有 5.8 kW 的力量的一根 semi-Gaussian CO2 激光横梁被使用时，这面镜子的反射率能关于 100% 到达。[从作者抽象]

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我们建议一面新奇镜子因为有蓝去谐的 semi-Gaussian 的冷分子微笑并且由蒙特卡罗模拟学习冷分子的动态思考过程。我们的学习证明这面镜子能认识到冷碘的镜子的思考有由 58.2% 的反射率的 30 mK 的温度的分子的横梁当 semi-Gaussian 激光力量是 1.0kW 时。当有 5.8 kW 的力量的一根 semi-Gaussian CO2 激光横梁被使用时，这面镜子的反射率能关于 100% 到达。[从作者抽象]
We investigate the diffraction characteristics of an incident Gaussian beam cut by a straight edge bounding a semi-infinite opaque plane using Kirchhoff scalar wave theory in the Fresnel limit and propose a new and simple mirror scheme to reflect atoms by using the intensity gradient induced by a blue-detuned semi-Gaussian laser beam. The optical potential of the diffracted light of the knife-cut semi-Gaussian beam for 85 Rb atom and its spontaneous emission probability are calculated and compared with the performance of the evanescent-wave mirror. Our study shows that the optical potential of the diffracted light of the semi-Gaussian beam is far higher than that of the evanescent light wave and the maximum normal velocity of the incident atoms can be far greater than that of the evanescent light wave under the same parameters, so the blue-detuned semi-Gaussian beam, as a novel atomic mirror, can be used to efficiently reflect cold atoms with a normal velocity of greater than 1 m/s. However, the intensity gradient (force) of the diffracted light of the semi-Gaussian-beam is much smaller than that of the evanescent light wave, so its spontaneous emission probability is greater than that from the evanescent-wave when the normal velocity of incident atoms is greater.