A spatial light modulator (SLM) has been used to create high quality Laguerre-Gaussian (LG) light beams, which have been used to study the guiding of cold rubidium atoms. The SLM allows real-time variation of the hollow guiding beam and permits direct comparison of the guided atom fluxes for different LG modes with minimal adjustment of the other optical components. It is demonstrated that, by increasing the azimuthal index l of the Laguerre-Gaussian beam, the radiation pressure pushing the trapped atoms may be reduced while maintaining the same guided flux. This is the first comparative study of hollow beam atom guiding, and further demonstrates the versatility of the SLM for studies in atom optics.
Bibliographical noteFunding Information:
Funding from the UK Engineering and Physical Sciences Research Council is gratefully acknowledged. DM acknowledges support from the Royal Society.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics