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原子在近共振激光驻波场中受光的作用力汇聚沉积,形成以激光半波长为周期的光栅结构.利用半经典模型对钠原子束在不饱和驻波场中的运动行为进行了理论研究,用数值方法模拟出在考虑横向温度、纵向速度和自由飞程后钠原子沉积的光栅结构,通过半高宽、对比度对最终沉积图样进行表征,分析了这些因素对沉积的影响,为正在开展的原子光刻实验提供了必要的理论依据.
The atoms are converged and deposited by the force of light in the near-resonance standing wave field of the laser to form a grating structure with a period of half wavelength of the laser.The theoretical study of the motion of sodium atomic beam in an unsaturated standing wave field is done by using a semi- The grating structures of sodium atoms deposited after considering the transverse temperature, longitudinal velocity and free flight were numerically simulated. The final deposition pattern was characterized by full width at half maximum and contrast. The influence of these factors on the deposition was analyzed. Atomic lithography experiments provide the necessary theoretical basis.