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arXiv · 2407.12668

All-optical Saddle Trap

Daniel Tandeitnik·Oscar Kremer·Felipe Almeida·Joanna Zielinska·Antonio Zelaquett Khoury·Thiago Guerreiro
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Abstract

The superposition of frequency-shifted Laguerre-Gauss modes can produce a rotating saddle-like intensity profile. When spinning fast enough, the optical forces produced by this structured light saddle generate a dynamically stable equilibrium point capable of trapping nanoparticles in a high vacuum, akin to a Paul trap but with its unique characteristics. We analyze the stability conditions and center-of-mass motion, dynamics and cooling of a nanoparticle levitated in the optical saddle trap. We expect the optical saddle to find applications in levitated optomechanics experiments requiring fast parametric modulation and inverted squeezing potential landscapes.

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Daniel Tandeitnik, Oscar Kremer, Felipe Almeida, Joanna Zielinska, Antonio Zelaquett Khoury, Thiago Guerreiro. 2024-07-17. All-optical Saddle Trap. https://arxiv.org/abs/2407.12668

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