物理学报Issue(5)：1-7,7.DOI:10.7498/aps.64.053701
可控双空心光束的理论方案及实验研究∗
Theoretical and exp erimental study of a controllable double-dark-hollow b eam
摘要
Abstract
A novel scheme is proposed for a double-dark-hollow beam (DDHB) based on non-full-range phase modulation with double-period. Upon illumination by a collimated He-Ni laser beam shaped by a round hole with a radius of 1.5 mm, the DDHB with an axial length of 30 mm, a width of 0.11—0.14 mm for each dark hollow beam and their separated distance being 57.6 µm is generated in the image space of lens with a focal length of 200 mm. The proposed scheme has the advantages of simple construction and high controllability, and the separated distance between the two light pipes is only dependent on the factor of phase modulation of p. Under the given conditions, a reversible evolution process from a DDHB to a single dark hollow beam (SDHB) can be realized. Experiments for our scheme are performed, results of which are consistent with the theoretical ones. A valuable expansion of the application of DDHB in blue-detuned optical trapping is also discussed. Double and four well hollow optical traps, even the hollow optical lattices can be obtained by using various spatial combinations of our DDHB. The proposed DDHB is expected to play an important role in the study of trapping and manipulation of cold atoms or molecules.关键词
双空心光束/原子光学/液晶空间光调制器/空心光阱Key words
double dark hollow beam/atom optics/liquid-crystal spatial light modulator/hollow optical trap引用本文复制引用
周琦,陆俊发,印建平..可控双空心光束的理论方案及实验研究∗[J].物理学报,2015,(5):1-7,7.基金项目
国家自然科学基金(批准号:11274114,10374029,10674047)、江西省教育厅科学技术研究项目(批准号：GJJ13465)和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资助的课题.@@@@* Project supported by the National Natural Science Foundation of China (Grant Nos.11274114,10374029,10674047), the Science and technology research Foundation of the Education Department of Jiangxi province, China (Grant No. GJJ13465), and the Foundation of State Key Laboratory of Precision Spectroscopy, East China Normal University, China （批准号:11274114,10374029,10674047）
