Abstract

A planar triplet of diffraction gratings is used to transform a single laser beam into a four-beam tetrahedral magneto-optical trap. This “flat” pyramid diffractor geometry is ideal for future microfabrication. We demonstrate the technique by trapping and subsequently sub-Doppler cooling ${}^{87}\text{Rb}$ atoms to $30\mathrm{\mu K}$.

© 2010 Optical Society of America

Sub-Doppler cooling of neutral atoms in a grating magneto-optical trap

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Single-laser, one beam, tetrahedral magneto-optical trap

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Λ-enhanced gray molasses in a tetrahedral laser beam geometry

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Single-beam atom trap in a pyramidal and conical hollow mirror

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