Optical forces near a nanoantenna
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In this article, the dependence of optical forces over a full range of excitation angles is explored: the total internal reflection excitation does not bring any particular advantage to trapping efficiency when compared to the normal incidence excitation.Abstract:
The Maxwell stress tensor method is used to calculate the optical forces acting upon a glass nanosphere in the proximity of optically excited gold nanoantenna structures The dependence of optical forces over a full range of excitation angles is explored: the total internal reflection excitation does not bring any particular advantage to trapping efficiency when compared to the normal incidence excitation Our calculations show multiple trapping sites with similar trapping properties for the normal and the total internal reflection cases, respectively; furthermore, the convective heating probably dominates over any optical forces in such systemsread more
Citations
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Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink
TL;DR: This work demonstrates the trapping and rotation of nanoparticles using a template-stripped plasmonic nanopillar incorporating a heat sink, and demonstrates the stable trapping of polystyrene particles, as small as 110 nm in diameter.
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Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting.
Brian J. Roxworthy,Kaspar D. Ko,Anup Kumar,Kin Hung Fung,Edmond Chow,Gang Logan Liu,Nicholas X. Fang,Kimani C. Toussaint +7 more
TL;DR: The use of low input power densities (power and NA) suggests that this bowtie nanoantenna trapping system will be particularly attractive for lab-on-a-chip technology or biological applications aimed at reducing specimen photodamage.
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Focused plasmonic trapping of metallic particles
Changjun Min,Zhe Shen,Zhe Shen,Junfeng Shen,Yuquan Zhang,Hui Fang,Guanghui Yuan,Luping Du,Siwei Zhu,Ting Lei,Xiaocong Yuan +10 more
TL;DR: Investigation of a mechanism by which metallic particles are attracted and trapped by plasmonic tweezers when surface plasmons are excited and focused by a radially polarized beam in a high-numerical-aperture microscopic configuration finds that it is the sum of both gradient and scattering forces acting in the same direction established by the strong coupling between the metallic particle and the highly focused plAsmonic field.
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Long-range and rapid transport of individual nano-objects by a hybrid electrothermoplasmonic nanotweezer
Justus C. Ndukaife,Alexander V. Kildishev,A. G. Agwu Nnanna,Vladimir M. Shalaev,Steven T. Wereley,Alexandra Boltasseva,Alexandra Boltasseva +6 more
TL;DR: The electrothermoplasmonic device enables on-demand long-range and rapid delivery of single nano-objects to specific plAsmonic nanoantennas, where they can be trapped and even locked in place and provides the potential for effective low-power nanomanufacturing on-chip.
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Understanding and controlling plasmon-induced convection.
TL;DR: It is shown both theoretically and experimentally that an array of plasmonic nanoantennas coupled to an optically absorptive indium-tin-oxide (ITO) substrate can generate >micrometre per second fluid convection.
References
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