TEM01模式激光对两能级原子的作用力研究

推导了两能级原子在稳态和小速度一阶微扰近似下的受力矢量方程，并分析表明ＴＥＭ０１模光场以原子的作用力中存在旋涡力，对在大正失谐δ〉〉Ω０〉〉Г和ｚ〈〈ｚ０＝ｋｗ＾２／λ条件下的ＴＥＭ０１模行波和驻波场中原子的受力进行了分析，对行波场，自发辐射对原子运动的影响很大，但在ｒ〈〈λ区域内原子受到横向囚禁力；对驻波场，自发辐射的影响可以忽略，考虑在ｚ方向波长范围内原子的平均受力得到的结论为：在横向，除了有

Study of Force of TEM＊01Laser on Two Level Atoms

The steady and 1st order velocity dependent vector solutions of forces for two level atom are obtained. The solutions are applied to TEM01 laser beam and analysis shows that it exists vortex force acting on the atom. On the condition of z≤z0=kw2/λ and large blue detuning δ≥Ω0≥Γ, the forces of TEM01 travelling and standing wave field acting on atom are analyzed. In general, for travlling wave filed the spontaneous emission playes an important role. In the region of r≤λ, atoms are only subject ot transeverse trapping force. For standing wave field the influence of spontaneous emission can be negligible. Averaging the forces in wavelength region along the direction of z, we show that there exist transverse trapping force and damping force for velocity vrer and there has not longtudinal trapping force but has longtudinal damping force for vzez. In the region of r≤λ, there only exists transeverse trapping force as well.