Hollow Bessel-like beam as an optical guide for a stream of microscopic particles

Date

2013-12-16

Authors

Eckerskorn, Niko
Li, Li
Kirian, Richard A
Küpper, Jochen
DePonte, Daniel P
Lee, Woei M
Chapman, Henry N
Rode, Andrei V
Krolikowski, Wieslaw

Journal Title

Journal ISSN

Volume Title

Publisher

Optical Society of America

Abstract

Current aerosol sample injection methods for coherent x-ray morphology suffer from excessive sample consumption due to the dispersion of the aerosol. To remedy this we propose here a high aspect ratio optical funnel by using a hollow Bessel-like beam with variable divergence, which may reduce sample consumption significantly. We present estimated optical forces exerted on the particles in the transverse plane, depending on various experimental conditions. We show that light pressure imposed by a funnel formed with 4.2 W continuous wave laser is sufficient to divert a stream of 2 µm polystyrene particles travelling ~50 m/s by ~1.5 × 10(-3) rad.

Description

Keywords

colloids, computer simulation, computer-aided design, equipment design, equipment failure analysis, flow injection analysis, lighting, models, theoretical, particle size, surface plasmon resonance, optical tweezers

Citation

Source

Optics express

Type

Journal article

Book Title

Entity type

Access Statement

Open Access

License Rights

Restricted until