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Creators/Authors contains: "Deshpande, Sanket"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Science Advances)
    We demonstrate trapping of individual rubidium (Rb) and cesium (Cs) atoms in an interleaved array of bright tweezers and dark bottle-beam traps, using a microfabricated optical element illuminated by a single-laser beam and a 4fsystem with spatial filtering. Our approach exploits the opposite-sign dynamic polarizabilities of Rb and Cs, ensuring that each species is exclusively trapped in either bright or dark sites. The passive optical mask creates optimal trap depths for both species using three transmittance levels while minimizing the optical phase difference, implemented using a variable-thickness absorbing layer of amorphous germanium. This trapping architecture achieves atom loading rates close to 50% while reducing system complexity compared to conventional methods using active optoelectronic components and/or multiple-laser wavelengths. 
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    Free, publicly-accessible full text available July 18, 2026
  2. ; ; ; ; ; ; ; ; (, Conference on Lasers and Electro-Optics, Technical Digest Series (Optica Publishing Group))
    We present a modeling method that incorporates full-wave electromagnetic simulations and radiation force calculations to evaluate the performance of grating chips for compact megneto-optical traps (MOTs). 
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    Accepted Manuscript Full Text Available