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Applications of spatial light modulators in atom optics

D. McGloin, G.C. Spalding, H. Melville, W. Sibbett, and K. Dholakia

Open Access Open Access

Abstract

We discuss the application of spatial light modulators (SLMs) to the field of atom optics. We show that SLMs may be used to generate a wide variety of optical potentials that are useful for the guiding and dipole trapping of atoms. This functionality is demonstrated by the production of a number of different light potentials using a single SLM device. These include Mach-Zender interferometer patterns and the generation of a bottle-beam. We also discuss the current limitations in SLM technology with regard to the generation of both static and dynamically deformed potentials and their use in atom optics.

©2003 Optical Society of America

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Figures (6)
Fig. 1.
Fig. 1. Holograms for a 10×10 square array of traps generated using the GS algorithm. (a) Input image (b) Generated phase hologram

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Fig. 2.
Fig. 2. SLM experimental setup

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Fig. 3.
Fig. 3. (a) Mach-Zender Interferometer pattern (b) Y-splitter pattern

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Fig. 4.
Fig. 4. (a) Blue-detuned Mach-Zender Interferometer pattern (b) Blue-detuned Y-splitter pattern

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Fig. 5.
Fig. 5. Square array patterns. In (a) we see a ten-by-ten arrays of spots. Here the lattice constant is such that the zeroth order diffraction pattern interferes with the array spots. By increasing the lattice constant we can move the desired pattern away from the unwanted spot. This can then be removed by spatial filtering. Alternatively we can chose to work in a region away from the zeroth order, design the hologram such that the desired pattern is not collinear with the zero order spot, e.g. (c) where the zero order spot is seen in the upper right corner.

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Fig. 6.
Fig. 6. SLM generated bottle beam. The images are taken by moving the camera in the beam propagation distance, with (a) nearest the SLM. The images show the bottle beam evolve through a bright spot to a bright ring surrounding a region of lower intensity. The beam then evolves into a bright spot again.

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