Controllable optical multi-well trap and its optical lattices using compounded cosine patterns |
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Authors: | Zhou Qi Lu Jun-Fa and Yin Jian-Ping |
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Institution: | Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Ministry of Education, Department of Physics, East China Normal University, Shanghai 200062, China; Department of Physics, East China Institute of Technology, Fuzhou 344000, Jiangxi Province, China |
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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. |
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Keywords: | multi-well optical trap optical lattices amplitude cosine-only grating spatial light modulator |
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