On-Axis Optical Trapping with Vortex Beams: The Role of the Multipolar Decomposition.

ABSTRACT: Optical trapping is a well-established, decades old technology with applications in several fields of research. The most common scenario deals with particles that tend to be centered on the brightest part of the optical trap. Consequently, the optical forces keep the particle away from the dark zones of the beam. However, this is not the case when a focused doughnut-shaped beam generates on-axis trapping. In this system, the particle is centered on the intensity minima of the laser beam and the bright annular part lies on the periphery of the particle. Researchers have shown great interest in this phenomenon due to its advantage of reducing light interaction with trapped particles and the intriguing increase in the trapping strength. This work presents experimental and theoretical results

SUBMITTER: Gomez-Viloria I 

PROVIDER: S-EPMC10885202 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature