Understanding Optical Trapping Phenomena: A Simulation for Undergraduates

Mas, Josep; Farré, Arnau; Cuadros, Jordi; Juvells, Ignasi; Carnicer, Artur

doi:10.1109/te.2010.2047107

Cited by 11 publications

(7 citation statements)

References 18 publications

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“…The technique has seen phenomenal interest; at the time of writing, Ashkin's 1986 paper [2] had been cited more than 2300 times! In addition, there have been several publications geared towards undergraduates understanding and experimenting with optical tweezers [4][5][6], illustrating the acceptance of the technique into mainstream optics.…”

Section: Laser Manipulationmentioning

confidence: 99%

Pushing, pulling and twisting liquid crystal systems: exploring new directions with laser manipulation

Sanders

Yang

Dickinson

et al. 2013

Phil. Trans. R. Soc. A.

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Optical tweezers are exciting tools with which to explore liquid crystal (LC) systems; the motion of particles held in laser traps through LCs is perhaps the only approach that allows a low Ericksen number regime to be accessed. This offers a new method of studying the microrheology associated with micrometre-sized particles suspended in LC media-and such hybrid systems are of increasing importance as novel soft-matter systems. This paper describes the microrheology experiments that are possible in nematic materials and discusses the sometimes unexpected results that ensue. It also presents observations made in the inverse system; micrometre-sized droplets of LC suspended in an isotropic medium.

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Section: Laser Manipulationmentioning

confidence: 99%

Pushing, pulling and twisting liquid crystal systems: exploring new directions with laser manipulation

Sanders

Yang

Dickinson

et al. 2013

Phil. Trans. R. Soc. A.

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“…One might wonder how can the bead trapped exactly at bottom interface, focus h = 0 µm. While the laser spot is adjusted to be at the bottom interface, the bead is trap a little off-axial direction since the scattering force is pushing the bead upward [13]. Thus, it is possible to trap the bead near the bottom.…”

Section: Resultsmentioning

confidence: 99%

Depth-Dependent Optical Stiffness Toward Water-Air Interface

Yeng¹,

Ayop²,

Mustapa³

2018

IJET

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This research attempted to quantify the optical stiffness of trapped polystyrene bead toward water-air interface. The optical tweezers with 975 nm wavelength was used to optically trap a single 3 micron diameter of bead in a water-contained cell with air exposed top water surface. The optical stiffness was justified on effective radius (r*) of the bead lateral spatial distribution. The scattered light signals due to the trapped bead at different laser focus height from the bottom glass-water interface (less than 20 µm) and laser trapping powers (1.7 mW to 7.5 mW) were analyzed to investigate the r* profile. It was found that within our experimental condition, r* was independent of focus height at fixed power and exponentially decay with respect to laser power at fixed focus height.

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“…, already quoted previously, dealing with localized approximations and localized beam models, from Gouesbet et al . reviewing expanded descriptions of arbitrary shaped beams in spheroidal coordinates, from Mas dealing with a “pedagogical review” to the understanding of optical trapping phenomena for undergraduates, from Nieminen et al . providing a very comprehensive review concerning the use of “T‐matrix method” for modeling optical tweezers with an interesting discussion concerning the use of the terminology “T‐matrix”, from Reiner et al .…”

Section: Miscellaneousmentioning

confidence: 99%