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Chinese Physics Letters

Analysis of Nanometer Structure for Chromium Atoms in Gauss Standing Laser Wave

张文涛, 朱保华, 熊显名 Xianming Xiong

Published Jan 1, 2010• 0 citations
OpenAlex

Abstract

在承受激光波浪的高斯的二水平的铬原子的运动的方程被讨论，铬原子的分发在不同横向的速度条件下面被给。结果证明原子的集中的位置将被原子的横向的速度影响。基于四顺序的 Runge-Kutta 方法，在承受激光波浪的高斯的铬原子的地点被模仿。纳米结构的三维的特征在完美、发出的条件下面被刺激。[从作者抽象]

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在承受激光波浪的高斯的二水平的铬原子的运动的方程被讨论，铬原子的分发在不同横向的速度条件下面被给。结果证明原子的集中的位置将被原子的横向的速度影响。基于四顺序的 Runge-Kutta 方法，在承受激光波浪的高斯的铬原子的地点被模仿。纳米结构的三维的特征在完美、发出的条件下面被刺激。[从作者抽象]
The equation of motion of two-level chromium atoms in Gauss standing laser wave is discussed and the distribution of chromium atoms is given under different transverse velocity conditions. The results show that the focusing position of atoms will be affected by the transverse velocity of atoms. Based on the four-order Runge-Kutta method, the locus of chromium atoms in Gauss standing laser wave is simulated. The three-dimensional characteristics of nanometer structures are stimulated under perfect and emanative conditions.
In order to analyze effect of atomic distribution on deposition preparation of nanometer gratings under the action of collimated laser,based on semi-classical theory and Runge-Kutta numerical integration algorithm,the characteristics of dissipative force and the distribution of chromium atoms in 1-D optical molasses was discussed.Then the distribution of chromium atoms was simulated under different laser parameters.The results show that the best distribution appears when the detuning of the laser frequency equals to half of line width of chromium atoms.After the atom beam passing through 1-D optical molasses,its spatial width was suppressed to 0.43 times of that before and the atomic density becomes 1.79 times larger than before,under the condition that laser power equals to 40mW and laser detuning is-2.5MHz.This results show that the atomic distribution can be improved under the action of collimated laser and it's helpful for the deposition preparation of nanometer gratings.