Trapping Microparticles in a Structured Dark Focus

Author(s)

Almeida, F. ; Sousa, I. ; Kremer, O. ; da Silva, B. Pinheiro ; Tasca, D. S. ; Khoury, A. Z. ; Temporao, G. ; Guerreiro, T.

• Document type: Journal article
• Source: Physical Review Letters; v. 131, n. 16, p. 6-pg., 2023-10-20.

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 dark focus tweezer. Results from power spectrum and potential analysis demonstrate the nonharmonicity of the trapping potential landscape, 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. (AU)

• FAPESP's process: 21/06736-5 - Nonlinear optomechanical devices as transducers for the quantum internet
• Grantee: Thiago Barbosa dos Santos Guerreiro
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 21/06823-5 - Quantum Rio network
• Grantee: Antonio Zelaquett Khoury
• Support Opportunities: Research Projects - Thematic Grants