物理学报2011，Vol.60Issue(3)：183-189,7.
中性钠原子在激光驻波场中的运动特性研究
The research of motorial characteristic of sodium atoms in standing wave field
摘要
Abstract
Direct write atom lithography is a new technique in which resonant light is used to pattern an atomic beam and the nanostructures are formed when the atoms deposit on the substrate.The motion of sodium atoms in standing wave filed is discussed.Based on the semi-classical model, this paper analyses the motion equation of sodium atom in the laser standing wave field, and then gets the trajectory of the atoms in the standing wave field by analytical simulation for different longitudinal and transverse velocities.The simulative results show that the FWHM width of stripes was 2.78 nm and the contrast was 38.5∶1 for the optimal longitudinal velocity, while that of the stripes was 29.1 nm and the contrast was 15∶1 for non-optimal longitudinal velocities.At the same time, the results show that the FWHM width of stripes was 4.2 nm and the contrast was 20∶1 when the divergence of atomic beam was 0.15 mrad.Whereas, the stripes presented Multipeaked configuration and the quality deteriorated with the divergence of atomic beam increased to 1.5 mrad.关键词
原子光刻/激光驻波场/条纹半高宽/条纹对比度Key words
atom lithography/ laser standing wave/ FWHM width/ contrast引用本文复制引用
张文涛,朱保华,熊显名..中性钠原子在激光驻波场中的运动特性研究[J].物理学报,2011,60(3):183-189,7.基金项目
国家自然科学基金(批准号:11064002)资助的课题. （批准号:11064002）
