Trapping metallic Rayleigh particles with radial polarization.

By Q. Zhan. Optics Express, 2004

751 citations recorded by the source corpus.

Metallic particles are generally considered difficult to trap due to strong scattering and absorption forces. In this paper, numerical studies show that optical tweezers using radial polarization can stably trap metallic particles in 3-dimension. The extremely strong axial component of a highly focused radially polarized beam provides a large gradient force. Meanwhile, this strong axial field component does not contribute to the Poynting vector along the optical axis. Consequently, it does not create axial scattering/absorption forces. Owing to the spatial separation of the gradient force and scattering/absorption forces, a stable 3-D optical trap for metallic particles can be formed.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/b95052c174cbdfdbe98426c594432e056a28a15c

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In Atomic and Molecular Physics, and Optics

1. Peter Zijlstra
2. Jian Wang
3. M. Orrit

Citations in the corpus

• Advances in communications using optical vortices (2016, background): “Polarization vortex beams have found interesting uses in sharp focus with super-resolution spots [8], plasmon excitation and tight focusing [9,10], single-molecule spectroscopy [11], lasing machining [12,13], electron and particle acceleration [14], and 3D optical trapping of nanoparticles, especial”
• Single metal nanoparticles: optical detection, spectroscopy and applications (2011, background): “Most often Gaussian beams are used, but also Laguerre–Gaussian [176] and radially polarized beams [177] can be employed for optical trapping.”