Rib waveguides for trapping and transport of particles

Optics Express
Balpreet Singh AhluwaliaOlav Gaute Hellesø

Abstract

Rib waveguides are investigated as an alternative to strip waveguides for planar trapping and transport of microparticles. Microparticles are successfully propelled along the surface of rib waveguides and trapped in the gap between opposing rib waveguides. The trapping capabilities of waveguide end facets formed by a single and opposing waveguide geometries are investigated. The slab beneath a rib waveguide continues to guide light after the end facet of a rib waveguide. Thus particles can be trapped in wider gaps formed by opposing rib waveguides than with strip waveguides. Rib waveguides were found more efficient in trapping a collection of particles in the gap and particles could be moved to different locations in the gap by changing the relative power in the two opposing rib waveguides. Numerical simulations are used to show that the trapping efficiency on the surface of rib and strip waveguides is comparable. The simulations also confirm the advantage of opposing rib waveguides for trapping particles in wide gaps. The low sidewalls of rib waveguides give low propagation losses and make it easy to integrate rib waveguides with other functions in a lab-on-a-chip where particle trapping and transport is required.

References

Aug 15, 2003·Nature·David G Grier
Aug 24, 2007·Lab on a Chip·Dongliang YinHolger Schmidt
Apr 1, 2009·Optics Express·Björn AgnarssonKristjan Leosson
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Mar 20, 2010·Journal of Biophotonics·Gregory P McNerneyThomas Huser
Apr 15, 2010·Optics Express·Brian S PhillipsAaron R Hawkins
Oct 14, 2010·Optics Express·Balpreet Singh AhluwaliaOlav Gaute Hellesø
Nov 24, 2011·Optics Express·Björn AgnarssonKristjan Leosson
Jul 21, 2012·Lab on a Chip·Olav Gaute HellesøBalpreet Singh Ahluwalia
Nov 10, 2013·Nature Nanotechnology·Onofrio M MaragòAndrea C Ferrari
Oct 8, 2014·Lab on a Chip·Pin-Tso LinPo-Tsung Lee
Nov 20, 2014·The Analyst·Balpreet Singh AhluwaliaOlav Gaute Hellesø
Apr 4, 2015·Optics Express·Øystein Ivar HelleOlav Gaute Hellesø

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Citations

Aug 23, 2018·Lab on a Chip·Azeem AhmadBalpreet Singh Ahluwalia

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