Method for realizing two-dimensional cold atom surface optic lattices by circular aperture array

Abstract

The invention discloses a method for realizing two-dimensional cold atom surface optic lattices by a circular aperture array and relates to the field of neutral cold atom laser imprison and cold atom optic lattices. The method is implemented by a laser source system, a focusing lens, a beam expanding lens, a sub-wavelength circular aperture array, two-dimensional cold atom surface optic lattices, magneto-optical trap atom optic viscose, an atom detector, a laser, a wave chopper, another focusing lens, an optical fiber and a computer system on the basis of near-field optic diffraction of the sub-wavelength circular aperture array. Laser light irradiates on the horizontally arranged sub-wavelength circular aperture and diffracts through the same, local reinforcing near optical fields distributed periodically are generated, and neutral cold atoms loaded can be effectively imprisoned, and two-dimensional cold atom surface optic lattices are realized. The method for realizing two-dimensional cold atom surface optic lattices can realize surface optic lattices of neutral cold atoms of different types, lattice constant is adjustable, principle is simple, operation is convenient, and application range is wide.

Description

technical field [0001] The invention relates to the field of cold-atom optical lattices, in particular to a method for realizing a two-dimensional cold-atom surface optical lattice with a circular aperture array, and is applicable to any type of neutral cold-atom optical lattice. Background technique [0002] In recent years, the study of atomic optical lattices based on one-dimensional, two-dimensional and three-dimensional standing wave laser fields has become one of the research hotspots in the field of cold atom physics and atomic optics. This technique has been gradually applied to the confinement and control of cold atoms and Bose-Einstein condensates (BEC), dynamics of polarization gradient cooling and trapping, Raman cooling and adiabatic cooling, quantum transport and tunneling, etc. in the research. In micro-optical trap arrays, especially in the research of quantum information, optical lattices and atom chips, it is of great significance to use surface atomic opt...

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Problems solved by technology

[0003] Although great achievements have been made in the study of atomic optical lattices, due to the influence of the diffraction limit of light, the characteristic scale of the light field of traditional atomic optical lattices can only be limited to the linear range of the half-wavelength order. On the micron scale, so this will bring some deficienci

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