Results 11 to 20 of about 50 (42)
Phase contrast optical tweezers
Optics Express, 2010 In this paper, for the first time, we report on systematic theoretical and experimental investigation of Phase Contrast Optical Tweezers (PCOT) which could be an indispensable tool for micromanipulation of the transparent micro and nano objects such as biological tissues and vesicles.
Ali, Mahmoudi, S Nader S, Reihani
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Photovoltaic versus optical tweezers
Optics Express, 2011 The operation of photovoltaic (PV) tweezers, using the evanescent light-induced PV fields to trap and pattern nano- and micro-meter particles on a LiNbO(3) crystal surface, is discussed. The case of a periodic light pattern is addressed in detail, including the role of particle shape and the modulation index of the light pattern.
Javier, Villarroel +5 more
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IEEJ Transactions on Sensors and Micromachines, 1996 Z J Ulanowski, Ian R Williams
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Deep learning for optical tweezers
NanophotonicsAbstractOptical tweezers exploit light–matter interactions to trap particles ranging from single atoms to micrometer-sized eukaryotic cells. For this reason, optical tweezers are a ubiquitous tool in physics, biology, and nanotechnology. Recently, the use of deep learning has started to enhance optical tweezers by improving their design, calibration ...
Antonio Ciarlo +7 more
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Optical Tweezers to Study Viruses
, 2013 A virus is a complex molecular machine that propagates by channeling its genetic information from cell to cell. Unlike macroscopic engines, it operates in a nanoscopic world under continuous thermal agitation. Viruses have developed efficient passive and active strategies to pack and release nucleic acids.
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Comparing Femtosecond Optical Tweezers with Conventional CW Optical Tweezers
In this work, we present a comparative study between continuous-wave (CW) and pulsed optical tweezers for 250 nm, 500 nm and 1-micron radius polystyrene beads at 5 different laser powers. We have used a Ti:Sapphire (MIRA 900F) laser that can be easily switched from CW to pulsed mode of operation, so there is no change in the experimental conditions in ...
Singh, Ajitesh +3 more
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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.
D W, Zhang, X C, Yuan
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2015
Combining state-of-the-art research with a strong pedagogic approach, this text provides a detailed and complete guide to the theory, practice and applications of optical tweezers. In-depth derivation of the theory of optical trapping and numerical modelling of optical forces are supported by a complete step-by-step design and construction guide for ...
Philip H. Jones +2 more
+4 more sources
Combining state-of-the-art research with a strong pedagogic approach, this text provides a detailed and complete guide to the theory, practice and applications of optical tweezers. In-depth derivation of the theory of optical trapping and numerical modelling of optical forces are supported by a complete step-by-step design and construction guide for ...
Philip H. Jones +2 more
+4 more sources