Trapping microparticles in a structured dark focus

• URL: http://arxiv.org/abs/2302.01953v2
• Date: Mon, 13 Nov 2023 16:31:36 GMT
• Title: Trapping microparticles in a structured dark focus
• Authors: F. Almeida, I. Sousa, O. Kremer, B. Pinheiro da Silva, D. S. Tasca, A. Z. Khoury, G. Tempor\~ao, and T. Guerreiro
• Abstract summary: We experimentally demonstrate stable trapping and controlled manipulation of silica microspheres in a structured optical beam consisting of a dark focus surrounded by light in all directions. Results from power spectrum and potential analysis demonstrate the non-harmonicity of the trapping potential landspace.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We experimentally demonstrate stable trapping and controlled manipulation of silica microspheres in a structured optical beam consisting of a dark focus surrounded by light in all directions - the so-called Dark Focus Tweezer. Results from power spectrum and potential analysis demonstrate the non-harmonicity of the trapping potential landspace, which is reconstructed from experimental data in agreement to Lorentz-Mie numerical simulations. Applications of the dark tweezer in levitated optomechanics and biophysics are discussed.

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