Light at work: The use of optical forces for particle manipulation, sorting, and analysis

Jonáš, Alexandr; Zemánek, Pavel

doi:10.1002/elps.200800484

Cited by 326 publications

(246 citation statements)

References 470 publications

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“…As chiral sorting strategies have a huge application potential, we anticipate that this study will promote further developments of the existing optofluidic toolbox 31,32 . It may also contribute to the emergence of other kinds of field-induced chiral sorting strategies more generally based on the use of angular momentum of light, be it of spin or orbital nature.…”

Section: Discussionmentioning

confidence: 97%

Optofluidic sorting of material chirality by chiral light

2014

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International audienceThe lack of mirror symmetry, chirality, plays a fundamental role in physics, chemistry and life sciences. The passive separation of entities that only differ by their handedness without need of a chiral material environment remains a challenging task with attractive scientific and industrial benefits. To date, only a few experimental attempts have been reported and remained limited down to the micron scale, most of them relying on hydrodynamical forces associated with the chiral shape of the micro-objects to be sorted. Here we experimentally demonstrate that material chirality can be passively sorted in a fluidic environment by chiral light owing to spin-dependent optical forces without chiral morphology prerequisite. This brings a new twist to the state-of-the-art optofluidic toolbox and the development of a novel kind of passive integrated optofluidic sorters able to deal with molecular scale entities is envisioned

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Section: Discussionmentioning

confidence: 97%

Optofluidic sorting of material chirality by chiral light

2014

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“…It is widely used in engineering and everyday life 20 . In microfluidic systems optical tweezers combined with feedback control provide a strategy to measure microscopic forces in polymers and molecular motors [21][22][23] . In lab-on-a-chip devices several strategies are suggested for sorting particles.…”

Section: Introductionmentioning

confidence: 99%

Feedback control of inertial microfluidics using axial control forces

Prohm

Stark

2014

Lab Chip

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Inertial microfluidics is a promising tool for many lab-on-a-chip applications. Particles in channel flows with Reynolds numbers above one undergo cross-streamline migration to a discrete set of equilibrium positions in square and rectangular channel cross sections. This effect has been used extensively for particle sorting and the analysis of particle properties. Using the lattice Boltzmann method, we determine equilibrium positions in square and rectangular cross sections and classify their types of stability for different Reynolds numbers, particle sizes, and channel aspect ratios. Our findings thereby help to design microfluidic channels for particle sorting. Furthermore, we demonstrate how an axial control force, which slows down the particles, shifts the stable equilibrium position towards the channel center. Ultimately, the particles then stay on the centerline for forces exceeding a threshold value. This effect is sensitive to particle size and channel Reynolds number and therefore suggests an efficient method for particle separation. In combination with a hysteretic feedback scheme, we can even increase particle throughput.

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“…Optical radiation forces are the mechanical manifestation of the transfer of the linear momentum of light to matter, which basically occurs when light is reflected, refracted, scattered, or absorbed in the course of its propagation [1]. In particular, the discontinuity of the dielectric permittivity at the interface between two transparent, homogeneous, and dielectric media leads to optical radiation pressure that enables the displacement of solids [2,3] or the deformation of fluid interfaces [4].…”

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confidence: 99%

Spin Controlled Optical Radiation Pressure

Tkachenko

Brasselet

2013

Phys. Rev. Lett.

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International audienceWe report on the full control of the optical radiation pressure at fixed photon flux and incident angle by the photon spin. This is done by using transparent chiral liquid crystal droplets that enable a strong coupling between the linear and angular degrees of freedom of a light field. From these results, we anticipate optical sorting of particles with different chirality as well as novel optical trapping and micromanipulation strategies

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Light at work: The use of optical forces for particle manipulation, sorting, and analysis

Cited by 326 publications

References 470 publications

Optofluidic sorting of material chirality by chiral light

Optofluidic sorting of material chirality by chiral light

Feedback control of inertial microfluidics using axial control forces

Spin Controlled Optical Radiation Pressure

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