物理学报2012，Vol.61Issue(22)：203-212,10.
用空间光调制器产生三维光阱阵列
Generation of the three-dimensional array of optical trap by spatial light modulator
摘要
Abstract
In this paper, a new scheme of generating a three-dimensional array of optical trap is proposed by using a composite phase grating that is fabricated by liquid crystal spatial light modulator. The composite phase grating is formed by combining the circular grating, which is generated by transforming a one-dimensional rectangular grating into a circular grating that can produce the longitudinal array of optical trap, with a two-dimensional rectangular grating. The grating that generates 5 × 5× 5 array of optical trap is simulated according to the technical parameters of the spatial light modulator. The output intensity distribution is calculated by using the Gaussian light wave with ordinary power as input light and focusing the diffracting light with lens. The results show that three-dimensional array of optical trap with a very high peak value of intensity and an intensity gradient is obtained around the focus of the lens. The optical dipole potential of trapping cold atoms achieves the order of mK, and the interaction force between the atom and the optical field is much greater than the atom gravity. When the high power laser is used as input light, the generated array of optical trap can also be employed to trap the cold molecules produced by Stark deceleration.关键词
原子光学/光阱阵列/空间光调制器Key words
atomic optics/array of optical trap/spatial light modulator分类
数理科学引用本文复制引用
徐淑武,周巧巧,顾宋博,纪宪明,印建平..用空间光调制器产生三维光阱阵列[J].物理学报,2012,61(22):203-212,10.基金项目
国家自然科学重点基金（批准号：11034002）、国家自然科学基金（批准号：10904037,10974055）、科技部量子调控重大研究计划项目（批准号：2011CB921602）、华东师范大学精密光谱科学与技术国家重点实验室开放基金和江苏省自然科学基金（批准号：BK2008183）资助的课题. （）
