Data for: "Phase-space properties of magneto-optical traps utilising micro-fabricated gratings."

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Description

We have used diffraction gratings to simplify the fabrication, and dramatically increase the atomic collection efficiency, of magneto-optical traps using micro-fabricated optics. The atom number enhancement was mainly due to the increased beam capture volume, afforded by the large area (4cm<sup>2</sup>) shallow etch (~ 200nm) binary grating chips. Here we provide a detailed theoretical and experimental investigation of the on-chip magneto-optical trap temperature and density in four different chip geometries using <sup>87</sup>Rb, whilst studying effects due to MOT radiation pressure imbalance. With optimal initial MOTs on two of the chips we obtain both large atom number (2×10<sup>7</sup>) and sub-Doppler temperatures (50 μK) after optical molasses.

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Date made available22 Dec 2022
Publisherfigshare

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