Two-dimensional novel optical for cold atoms lattices with multi-well traps or molecules

陆俊发 Lu Junfa, 纪宪明 Ji Xianming, 周琦 Zhou Qi +1 more

陆俊发 Lu Junfa, 纪宪明 Ji Xianming, 印建平 Yin Jianping

陆俊发 Lu Junfa, 陆荷琴 Lu Heqin, 周琦 Zhou Qi +1 more

LU Jun-fa, Ji Xian-Ming, Jianping Yin

We propose some new schemes to constitute two-dimensional (2D) array of multi-well optical dipole traps for cold atoms (or molecules) by using an optical system consisting of a binary 'pi'-phase grating and a 2D array of rectangle microlens. We calculate the intensity distribution of each optical well in 2D array of multi-well traps and its geometric parameters and so on. The proposed 2D array of multi-well traps can be used to form novel 2D optical lattices with cold atoms (or molecules), and form various novel optical crystals with cold atoms (or molecules), or to perform quantum computing and quantum information processing on an atom chip, even to realize an array of all-optical multi-well atomic (or molecular) Bose-Einstein condensates (BECs) on an all-optical integrated atom (or molecule) chip.

周琦, 陆俊发, 印建平

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.

M. L. Miguez, Ph. W. Courteille