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Optical doughnut for optical tweezers
Optics Letters, 2003We describe novel optical doughnuts for optical tweezers. With new phase functions, the proposed doughnut beams have dark cores in specified shapes. The technique can offer a simple method for creating a variety of beam shapes to match the trapped objects.
Xin Yuan, Dawei Zhang
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Optical Trapping and Optical Micromanipulation XV, 2018
Feedback traps can manipulate particles arbitrarily. In a feedback trap, a position detector detects the particle’s position, a computer calculates the necessary force to be applied based on the position in the “virtual potential,” which is applied to the particle. The process is repeated with as fast a loop rate as practical.
Avinash Kumar, John Bechhoefer
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Feedback traps can manipulate particles arbitrarily. In a feedback trap, a position detector detects the particle’s position, a computer calculates the necessary force to be applied based on the position in the “virtual potential,” which is applied to the particle. The process is repeated with as fast a loop rate as practical.
Avinash Kumar, John Bechhoefer
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2007
We outline the basic principles of optical tweezers as well as the fundamental theory underlying optical tweezers. The optical forces responsible for trapping result from the transfer of momentum from the trapping beam to the particle and are explained in terms of the momenta of incoming and reflected or refracted rays.
Nieminen, T. A. +3 more
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We outline the basic principles of optical tweezers as well as the fundamental theory underlying optical tweezers. The optical forces responsible for trapping result from the transfer of momentum from the trapping beam to the particle and are explained in terms of the momenta of incoming and reflected or refracted rays.
Nieminen, T. A. +3 more
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Introduction to Optical Tweezers
2016Thirty years after their invention by Arthur Ashkin and colleagues at Bell Labs in 1986 [1], optical tweezers (or traps) have become a versatile tool to address numerous biological problems. Put simply, an optical trap is a highly focused laser beam that is capable of holding and applying forces to micron-sized dielectric objects.
Matthias D. Koch, Joshua W. Shaevitz
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Automation of optical tweezers [PDF]
SPIE Proceedings, 2000 Optical tweezers is a newly developed instrument, which makes possible the manipulation of micro-optical particles under a microscope. In this paper, we present the automation of an optical tweezers which consists of a modified optical tweezers, equipped with two motorized actuators to deflect a 1 W argon laser beam, and a computer control system ...
Tseng Ming Hsieh, Bo-Jui Chang, Long Hsu
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Optical tweezers in cell biology [PDF]
Trends in Cell Biology, 1992 The authors are at the Department of Cell Biology, Box 3709, Duke University Medical Center, Durham, NC 27710, USA. The invention of the single-beam optical gradient trap I-3, known less formally as optical tweezers, has opened possibilities in cell biology that are only beginning to be re- alized.
Michael P. Sheetz, Scot C. Kuo
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Advantages of Holographic Optical Tweezers
Novel Optical Instrumentation for Biomedical Applications, 2003In the last decade optical tweezers became an important tool in microbiology. However the setup becomes very complex if more than one trap needs to be moved. Holographic tweezers offer a very simple and cost efficient way of manipulating several traps independently in all three dimensions with an accuracy of less than 100 nm.
Tobias Haist +3 more
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Is it possible to enlarge the trapping range of optical tweezers via a single beam?
Applied Physics Letters, 2019For optical tweezers, a tiny focal spot of the trapping beam is necessary for providing sufficient intensity-gradient force. This condition results in a limited small trapping range to guarantee stable trapping of the particle.
X. Z. Li +6 more
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Optical tweezers stretching of chromatin
2003Recently significant success has emerged from exciting research involving chromatin stretching using optical tweezers. These experiments, in which a single chromatin fibre is attached by one end to a micron-sized bead held in an optical trap and to a solid surface or second bead via the other end, allows manipulation and force detection at a single ...
Lisa H. Pope +2 more
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Optical Tweezers and Optofluidics
2006 Digest of the LEOS Summer Topical Meetings, 2006In this paper, the authors demonstrated the use of optically trapped microspheres to tune the transmission properties of embedded fiber optic waveguides, and the use of optical tweezers for optical actuation of cantilevers for use as switches and sensors.
Mark Cronin-Golomb +2 more
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