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Chin. Phys. B, 2010, Vol. 19(12): 123203    DOI: 10.1088/1674-1056/19/12/123203

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

Zhou Qi(周琦)a)b), Lu Jun-Fa(陆俊发)b), and Yin Jian-Ping(印建平)a)†
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Ministry of Education, Department of Physics, East China Normal University, Shanghai 200062, China; b Department of Physics, East China Institute of Technology, Fuzhou 344000, Jiangxi Province, China
Abstract  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.
Keywords:  multi-well optical trap      optical lattices      amplitude cosine-only grating      spatial light modulator  
Received:  26 March 2010      Revised:  10 July 2010      Accepted manuscript online: 
PACS:  37.10.De (Atom cooling methods)  
  42.79.Bh (Lenses, prisms and mirrors)  
Fund: 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), and the Open Research Fund of State Key Laboratory of Precision Spectroscopy, East China Normal University.

Cite this article: 

Zhou Qi(周琦), Lu Jun-Fa(陆俊发), and Yin Jian-Ping(印建平) Controllable optical multi-well trap and its optical lattices using compounded cosine patterns 2010 Chin. Phys. B 19 123203

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