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Related Experiment Video

Updated: Jun 22, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Cold atom guidance using a binary spatial light modulator.

F Fatemi, M Bashkansky

    Optics Express
    |June 9, 2009
    PubMed
    Summary
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    We guided cold Rubidium-85 atoms using a novel hollow laser beam. This method offers precise control for atom manipulation in optical experiments.

    Area of Science:

    • Atomic physics
    • Laser physics
    • Optical trapping

    Background:

    • Atom guiding and trapping are crucial for quantum technologies.
    • High-intensity laser beams can be detrimental to cold atoms.
    • Precisely controlled laser fields are needed for advanced atomic manipulation.

    Purpose of the Study:

    • To demonstrate guiding of cold Rubidium-85 atoms using a blue-detuned, high-order hollow laser beam.
    • To analyze the characteristics of the generated hollow laser beams.
    • To quantify the laser intensity experienced by the atoms during guiding.

    Main Methods:

    • Generating a high-order hollow laser beam using a binary spatial light modulator with custom holograms.
    • Guiding cold (85)Rb atoms in the generated hollow laser beam.

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    Last Updated: Jun 22, 2026

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
    08:39

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

    Published on: January 28, 2019

    Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
    11:21

    Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

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  • Numerical and experimental analysis of the laser beam properties and atom-light interaction.
  • Measuring atom exposure to laser intensity at specific detuning and power levels.

    • Main Results:

    • Successfully guided cold (85)Rb atoms using the hollow laser beam.
    • Produced smooth hollow laser beams with steep intensity walls, updatable at 1.6 kHz.
    • Determined that atoms experienced an average intensity of ~2% of the maximum guide intensity.
    • Achieved this with a laser detuning of 1 GHz and 2 mW optical power.

    Conclusions:

    • The developed hollow laser beam generation technique is effective for guiding cold atoms.
    • The method allows for precise control over atom-laser interactions, minimizing intensity damage.
    • This technique has potential applications in atom optics and quantum information processing.