Optical Trapping in a Dark Focus

Abstract

The superposition of a Gaussian mode and a Laguerre-Gauss mode with $\ell =0,p\ne 0$ generates the so-called bottle beam: a dark focus surrounded by a bright region. In this paper, we theoretically explore the use of bottle beams as an optical trap for dielectric spheres with a refractive index smaller than that of their surrounding medium. The forces acting on a small particle are derived within the dipole approximation and used to simulate the Brownian motion of the particle in the trap. The intermediate regime of particle size is studied numerically and it is found that stable trapping of larger dielectric particles is also possible. Based on the results of the intermediate regime analysis, an experiment aimed at trapping living organisms in the dark focus of a bottle beam is proposed.

14 pages, 9 figures

References in corpus (13)

• Detecting high-frequency gravitational waves with optically-levitated sensors
• Short-range force detection using optically-cooled levitated microspheres
• Search for Millicharged Particles Using Optically Levitated Microspheres
• Force and acceleration sensing with optically levitated nanogram masses at microkelvin temperatures
• Three-dimensional trapping of individual Rydberg atoms in ponderomotive bottle beam traps
• Optical Tweezers: Phototoxicity and Thermal Stress in Cells and Biomolecules
• Optical dipole traps and atomic waveguides based on Bessel light beams
• Atom trapping in an interferometrically generated bottle beam trap
• Experimental optical trapping of micro-particles with Frozen Waves
• Probing the Casimir force with optical tweezers
• A crossed vortex bottle beam trap for single-atom qubits
• Pattern revivals from fractional Gouy phases in structured light
• Relaxing constraints on data acquisition and position detection for trap stiffness calibration in optical tweezers

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