Multi-functional optical tweezers using computer-generated holograms

Liesener, Jan; Reicherter, M.; Haist, Tobias; Tiziani, Hans J.

doi:10.1016/s0030-4018(00)00990-1

Cited by 397 publications

(239 citation statements)

References 12 publications

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“…First, static diffractive optical elements generated by computer and manufactured by photolithography, enabled the simultaneous creation of several optical traps [1,2]. Conversion of the static trap arrays into dynamic light patterns by displaying the diffractive optical elements on spatial light modulators was the logical next step [3][4][5][6]. These special displays can be updated at video rates, so that with every new diffractive element a completely different optical potential is formed at the sample plane.…”

Section: Introductionmentioning

confidence: 99%

Design strategies for optimizing holographic optical tweezers set-ups

Martı́n-Badosa¹,

Montes-Usategui²,

Carnicer³

et al. 2007

J. Opt. A: Pure Appl. Opt.

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Abstract. We provide a detailed account of the construction of a system of holographic optical tweezers. While a lot of information is available on the design, alignment and calibration of other optical trapping configurations, those based on holography are relatively poorly described. Inclusion of a spatial light modulator in the setup gives rise to particular design trade-offs and constraints, and the system benefits from specific optimization strategies, which we discuss.

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Section: Introductionmentioning

confidence: 99%

Design strategies for optimizing holographic optical tweezers set-ups

Martı́n-Badosa¹,

Montes-Usategui²,

Carnicer³

et al. 2007

J. Opt. A: Pure Appl. Opt.

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“…A single optical trap could thus be divided into several optical traps, each individually controllable by updating the kinoform displayed on the SLM [7,8]. The SLMs used for optical tweezers applications are commonly based on liquid crystals that modulate the phase of the incident light.…”

Section: Introductionmentioning

confidence: 99%

The effect of external forces on discrete motion within holographic optical tweezers

Eriksson¹,

Keen²,

Leach³

et al. 2007

Opt. Express

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Holographic optical tweezers is a widely used technique to manipulate the individual positions of optically trapped micron-sized particles in a sample. The trap positions are changed by updating the holographic image displayed on a spatial light modulator. The updating process takes a finite time, resulting in a temporary decrease of the intensity, and thus the stiffness, of the optical trap. We have investigated this change in trap stiffness during the updating process by studying the motion of an optically trapped particle in a fluid flow. We found a highly nonlinear behavior of the change in trap stiffness vs. changes in step size. For step sizes up to approximately 300 nm the trap stiffness is decreasing. Above 300 nm the change in trap stiffness remains constant for all step sizes up to one particle radius. This information is crucial for optical force measurements using holographic optical tweezers.

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“…Optical manipulation is based on trapping particles in regions of high optical field intensity (9). Fast scanning of optical beams has been successful in manipulating colloidal particles over a relatively small area (10); however, optical trapping over large areas requires the task of generating holographic maps (11), which are difficult to reconfigure. Electric field manipulation is based on trapping particles in the minima or maxima regions of electric field intensity, which can be accomplished by applying ac electric field to arrays of electrodes at various frequencies (12,13).…”

mentioning

confidence: 99%

Arranging matter by magnetic nanoparticle assemblers

Yellen

Hovorka

Friedman

2005

Proc. Natl. Acad. Sci. U.S.A.

221

177

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We introduce a method for transporting colloidal particles, large molecules, cells, and other materials across surfaces and for assembling them into highly regular patterns. In this method, nonmagnetic materials are manipulated by a fluid dispersion of magnetic nanoparticles. Manipulation of materials is guided by a program of magnetic information stored in a substrate. Dynamic control over the motion of nonmagnetic particles can be achieved by reprogramming the substrate magnetization on the fly. The unexpectedly large degree of control over particle motion can be used to manipulate large ensembles of particles in parallel, potentially with local control over particle trajectory.colloidal ͉ manipulation ͉ self-assembly ͉ tweezing ͉ transport

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Multi-functional optical tweezers using computer-generated holograms

Cited by 397 publications

References 12 publications

Design strategies for optimizing holographic optical tweezers set-ups

Design strategies for optimizing holographic optical tweezers set-ups

The effect of external forces on discrete motion within holographic optical tweezers

Arranging matter by magnetic nanoparticle assemblers

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