期刊
OPTICS EXPRESS
卷 15, 期 14, 页码 8619-8625出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.15.008619
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- Engineering and Physical Sciences Research Council [EP/C533496/1] Funding Source: researchfish
We propose a versatile optical ring lattice suitable for trapping cold and quantum degenerate atomic samples. We demonstrate the realisation of intensity patterns from pairs of Laguerre-Gauss (exp(il theta)) modes with different l indices. These patterns can be rotated by introducing a frequency shift between the modes. We can generate bright ring lattices for trapping atoms in red-detuned light, and dark ring lattices suitable for trapping atoms with minimal heating in the optical vortices of blue-detuned light. The lattice sites can be joined to form a uniform ring trap, making it ideal for studying persistent currents and the Mott insulator transition in a ring geometry. (c) 2007 Optical Society of America
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