Nanovortex-Driven All-Dielectric Optical Diffusion Boosting and Sorting Concept for Lab-on-a-Chip Platforms

Advanced Science
Adrià Canós ValeroAlexander S Shalin

Abstract

The ever-growing field of microfluidics requires precise and flexible control over fluid flows at reduced scales. Current constraints demand a variety of controllable components to carry out several operations inside microchambers and microreactors. In this context, brand-new nanophotonic approaches can significantly enhance existing capabilities providing unique functionalities via finely tuned light-matter interactions. A concept is proposed, featuring dual on-chip functionality: boosted optically driven diffusion and nanoparticle sorting. High-index dielectric nanoantennae is specially designed to ensure strongly enhanced spin-orbit angular momentum transfer from a laser beam to the scattered field. Hence, subwavelength optical nanovortices emerge driving spiral motion of plasmonic nanoparticles via the interplay between curl-spin optical forces and radiation pressure. The nanovortex size is an order of magnitude smaller than that provided by conventional beam-based approaches. The nanoparticles mediate nanoconfined fluid motion enabling moving-part-free nanomixing inside a microchamber. Moreover, exploiting the nontrivial size dependence of the curled optical forces makes it possible to achieve precise nanoscale sorting of ...Continue Reading

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Citations

Sep 30, 2020·Optics Express·Andrei KiselevOlivier J F Martin
Mar 29, 2021·Biosensors & Bioelectronics·Qing GaoBaojun Li
Dec 8, 2020··Alexander Shalin, Hadi Shamkhi
Dec 8, 2020··Alexander ShalinAdrià Canós Valero
Dec 8, 2020··Alexander. A. PavlovAlexander. S. Shalin
Dec 8, 2020··Pavel GinzburgAlexander S. Shalin

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Methods Mentioned

BETA
chip

Software Mentioned

COMSOL Multiphysics

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