2011
DOI: 10.1063/1.3625936
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On-a-chip surface plasmon tweezers

Abstract: We report on an integrated optical trapping platform operated by simple fiber coupling. The system consists of a dielectric channel optical waveguide decorated with an array of gold micro-pads. Through a suitable engineering of the waveguide mode, we achieve light coupling to the surface plasmon resonance of the gold pads that act as individual plasmonic traps. We demonstrate parallel trapping of both micrometer size polystyrene beads and yeast cells at predetermined locations on the chip with only 20 mW total… Show more

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Cited by 38 publications
(35 citation statements)
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“…The possibility of trapping and moving nanoparticles and microparticles using an evanescent field that appeared with total internal reflection from a smooth surface and in optical waveguides was shown [64][65][66][67]. Large values of optical field gradients can be achieved by using optical resonances of surface plasmons on metallic films and in plasmonic structures [68][69][70][71][72][73]. However, local heating under the influence of optical radiation usually makes complicated the use of metal structures.…”
Section: The Bsw Application In Microparticle Optical Trappingmentioning
confidence: 99%
“…The possibility of trapping and moving nanoparticles and microparticles using an evanescent field that appeared with total internal reflection from a smooth surface and in optical waveguides was shown [64][65][66][67]. Large values of optical field gradients can be achieved by using optical resonances of surface plasmons on metallic films and in plasmonic structures [68][69][70][71][72][73]. However, local heating under the influence of optical radiation usually makes complicated the use of metal structures.…”
Section: The Bsw Application In Microparticle Optical Trappingmentioning
confidence: 99%
“…179 In this work, polystyrene (Ø5 lm) particles and yeast cells were manipulated and trapped in close vicinity of the micro-pads, where the optical intensity gradients were high. In a separate work, the transport of polystyrene (Ø6 lm, 1 lm, and 200 nm) particles was demonstrated near the surface of gold nano-structures ($130 nm diameter gold nano-dot pairs separated by a gap of 200 nm).…”
Section: Plasmonic Transport Of Particlesmentioning
confidence: 99%
“…The applications of such optofluidic devices are mostly found in areas of particle manipulation [177][178][179][180] and sensing. 88,181 Commonly in many plasmonic measurements and manipulations, metal (such as gold or silver) nanostructures or nanoparticles are used to provide the enhancement for surface plasmons.…”
Section: E Plasmonic Inspired Optofluidicsmentioning
confidence: 99%
“…By understanding and controlling the interactions between these objects and surface plasmons, researchers have developed approaches for efficiently sensing, analyzing, trapping, transporting and manipulating molecules and cells [1320]. These developments have led to novel devices and analytical tools for applications in biology and nanomedicine and to the formation of the field of molecular plasmonics (Figure 2) .…”
mentioning
confidence: 99%