Tunable soft-matter optofluidic waveguides assembled by light

Brzobohatý, Oto; Chvátal, Lukáš; Jonáš, Alexandr; Šiler, Martin; Kaňka, Jan; Ježek, Jan; Zemánek, Pavel

doi:10.1364/oma.2019.aw5e.1

Cited by 4 publications

(4 citation statements)

References 41 publications

(53 reference statements)

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“…These pioneering results were subsequently followed by detailed studies of one-dimensional self-arrangement of particles in Gaussian beams [247][248][249][250][251] and Bessel beams [252][253][254]. The principle was also adopted to dynamical control of the size and shape of multidimensional optically bound matter [254] that was utilized as a tunable soft-matter optofluidic waveguide assembled by light [255].…”

Section: Dual-beam Geometrymentioning

confidence: 99%

Perspective on light-induced transport of particles: from optical forces to phoretic motion

et al. 2019

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Propulsive effects of light, which often remain unnoticed in our daily-life experience, manifest themselves on spatial scales ranging from subatomic to astronomical. Light-mediated forces can indeed confine individual atoms, cooling their effective temperature very close to absolute zero, as well as contribute to cosmological phenomena such as the formation of stellar planetary systems. In this review, we focus on the transport processes that light can initiate on small spatial scales. In particular, we discuss in depth various light-induced mechanisms for the controlled transport of microscopic particles; these mechanisms rely on the direct transfer of momentum between the particles and the incident light waves, on the combination of optical forces with external forces of other nature, and on light-triggered phoretic motion. After a concise theoretical overview of the physical origins of optical forces, we describe how these forces can be harnessed to guide particles either in continuous bulk media or in the proximity of a constraining interface under various configurations of the illuminating light beams (radiative, evanescent, or plasmonics fields). Subsequently, we introduce particle transport techniques that complement optical forces with counteracting forces of non-optical nature. We finally discuss particle actuation schemes where light acts as a fine knob to trigger and/or modulate phoretic motion in spatial gradients of non-optical (e.g., electric, chemical, or temperature) fields. We conclude by outlining possible future fundamental and applied directions for research in light-induced particle transport. We believe that this comprehensive review can inspire diverse, interdisciplinary scientific communities to devise novel, unorthodox ways of assembling and manipulating materials with light.

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Section: Dual-beam Geometrymentioning

confidence: 99%

Perspective on light-induced transport of particles: from optical forces to phoretic motion

et al. 2019

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“…Although the current optical force theory is yet to be optimized for better understanding nonlinear phenomena in nano-and biosoft matter, it has already boosted the exploration of the nonlinear optical responses of various colloidal suspensions. Over the time, numerous studies were performed to understand the nonlinear optical properties of nanosuspensions and their application to generate optical spatial solitons [55][56][57][58][59][60][61]. These demonstrate various optical strategies which enables the formation of waveguides with different lengths and deeper light propagation.…”

Section: Theoretical Analysis Of Optical Forcesmentioning

confidence: 99%

Nonlinear optical response and self-trapping of light in biological suspensions

Gautam

Bezryadina

Xiang

et al. 2020

Advances in Physics: X

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In the past decade, the development of artificial materials exhibiting novel optical properties has become a major scientific endeavor. One particularly interesting system is synthetic soft matter, which plays a central role in numerous fields ranging from life sciences, chemistry to condensed matter and biophysics. In this paper, we review briefly the optical force-induced nonlinearities in colloidal suspensions, which can give rise to nonlinear self-trapping of light for enhanced propagation through otherwise highly scattering media such as dielectric and plasmonic nanosuspensions. We then focus on discussing our recent work with respect to nonlinear biological suspensions, including self-trapping of light in colloidal suspensions of marine bacteria and red blood cells, where the nonlinear response is largely attributed to the optical forces acting on the cells. Although it is commonly believed that biological media cannot exhibit high optical nonlinearity, self-focusing of light and formation of soliton-like waveguides in bio-soft matter have been observed. Furthermore, we present preliminary results on biological waveguiding and sensing, and discuss some perspectives towards biomedical applications. The concept may be developed for subsequent studies and techniques in situations when low scattering and deep penetration of light is desired.

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“…Given the small operation scales of microfluidics, micron-scale focusing of laser beams, as well as different types of light matter interactions make possible to provide sufficiently strong optical forces to propel particles [23][24][25] , sort objects according to their size or optical properties [26][27][28] or self-arrange colloidal particles into optically bound structures [23][24][25]29,30 . Nowadays the additional degrees of freedom offered by complex shaping of laser beams [31][32][33][34][35] have made possible the manipulation and trapping of large amounts of microparticles 36 .…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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The ever-growing field of microfluidics requires precise and flexible control over fluid flow at the micro-and nanoscales. Current constraints demand a variety of controllable components for performing different operations inside closed microchambers and microreactors. In this context, novel nanophotonic approaches can significantly enhance existing capabilities and provide new functionalities via finely tuned light-matter interaction mechanisms. Here we propose a novel design, featuring a dual functionality on-chip: boosted optically-driven particle diffusion and nanoparticle sorting. Our methodology is based on a specially designed high-index dielectric nanoantenna, which strongly enhances spin-orbit angular momentum transfer from an incident laser beam to the scattered field. As a result, exceptionally compact, subwavelength optical nanovortices are formed and drive spiral motion of peculiar plasmonic nanoparticles via the efficient interplay between curled 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 nano-confined fluid motion enabling nanomixing without a need of moving bulk elements inside a microchamber. Moreover, precise sorting of gold nanoparticles, demanded for on-chip separation and filtering, can be achieved by exploiting the nontrivial dependence of the curled optical forces on the nanoobjects' size. Altogether, this study introduces a versatile platform for further miniaturization of moving-part-free, optically driven microfluidic chips for fast chemical synthesis and analysis, preparation of emulsions, or generation of chemical gradients with light-controlled navigation of nanoparticles, viruses or biomolecules.

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Tunable soft-matter optofluidic waveguides assembled by light

Cited by 4 publications

References 41 publications

Perspective on light-induced transport of particles: from optical forces to phoretic motion

Perspective on light-induced transport of particles: from optical forces to phoretic motion

Nonlinear optical response and self-trapping of light in biological suspensions

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

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