Controllable optical multi-well trap and its optical lattices using compounded cosine patterns  

作　　者：周琦 陆俊发 印建平 

机构地区：[1]Key Laboratory of Optical and Magnetic Resonance Spectroscopy,Ministry of Education,Department of Physics,East China Normal University [2]Department of Physics,East China Institute of Technology

出　　处：《Chinese Physics B》2010年第12期181-192,共12页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.10434060,10674047 and 10804031);the National Key Basic Research and Development Program of China(Grant No.2006CB921604);the Program for Changjiang Scholar and Innovative Research Team,and Shanghai Leading Academic Discipline Project(Grant No.B408);the Youth Foundation of Jiangxi Educational Committee(Grant No.GJJ09530);the Open Research Fund of State Key Laboratory of Precision Spectroscopy,East China Normal University.

摘　　要：This paper proposes a flexible scheme to form various optical multi-well traps for cold atoms or molecules by using a simple optical system composed of an compounded amplitude cosine-only grating and a single lens illuminated by a plane light wave or a Gaussian beam. Dynamic manipulation and evolution of multi-well trap can be easily implemented by controlling the modulation frequency of the cosine patterns. It also discusses how to expand this multi-well trap to two-dimensional lattices with single- or multi-well trap by using an orthogonally or non-orthogonally modulated grating, as well as using incoherent multi-beam illumination, and these results show that all the symmetric structures of two-dimensional Bravais lattices can be obtained facilely by using proposed scheme.This paper proposes a flexible scheme to form various optical multi-well traps for cold atoms or molecules by using a simple optical system composed of an compounded amplitude cosine-only grating and a single lens illuminated by a plane light wave or a Gaussian beam. Dynamic manipulation and evolution of multi-well trap can be easily implemented by controlling the modulation frequency of the cosine patterns. It also discusses how to expand this multi-well trap to two-dimensional lattices with single- or multi-well trap by using an orthogonally or non-orthogonally modulated grating, as well as using incoherent multi-beam illumination, and these results show that all the symmetric structures of two-dimensional Bravais lattices can be obtained facilely by using proposed scheme.

关 键 词：multi-well optical trap optical lattices amplitude cosine-only grating spatial light modulator 

分 类 号：O431.2[机械工程—光学工程] O56[理学—光学]