Optical path clearing and enhanced transmission through colloidal suspensions

We utilize advanced laser fields to clear a path through a dynamic turbid medium, a concept termed "Optical path clearing (OPC)." Particles are evacuated from a volume of the medium using the gradient and/or scattering forces due to an applied laser field with a suitably tailored spatial p...

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Bibliographic Details
Published in:Optics express 2010-08, Vol.18 (16), p.17130-17140
Main Authors: Baumgartl, J, Cizmár, T, Mazilu, M, Chan, V C, Carruthers, A E, Capron, B A, McNeely, W, Wright, E M, Dholakia, K
Format: Article
Language:English
Subjects:
Electronics - instrumentation
Equipment Design
Lasers
Light
Signal Processing, Computer-Assisted - instrumentation
Suspensions - chemistry
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Summary:We utilize advanced laser fields to clear a path through a dynamic turbid medium, a concept termed "Optical path clearing (OPC)." Particles are evacuated from a volume of the medium using the gradient and/or scattering forces due to an applied laser field with a suitably tailored spatial profile. Our studies encompass both an analytical model and proof-of-principle experiments where paths are cleared in dense bulk colloidal suspensions. Based on our results we suggest that high-performance and high efficiency OPC will be achieved by multiple-step clearing using dynamic laser fields based on Airy or inverted axicon beams.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.18.017130