Results 81 to 90 of about 53,364 (200)
Particle tracking stereomicroscopy in optical tweezers: control of trap shape [PDF]
, 2010 We present an optical system capable of generating stereoscopic images to track trapped particles in three dimensions. Two-dimensional particle tracking on each image yields three dimensional position information.
Asavei +34 more
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Optical Tweezers: Phototoxicity and Thermal Stress in Cells and Biomolecules
Micromachines, 2019 For several decades optical tweezers have proven to be an invaluable tool in the study and analysis of myriad biological responses and applications. However, as with every tool, they can have undesirable or damaging effects upon the very sample they are ...
Alfonso Blázquez-Castro
doaj +1 more source
Assembly and force measurement with SPM-like probes in holographic optical tweezers [PDF]
, 2009 We report a high fidelity tomographic reconstruction of the quantum state of photon pairs generated by parametric down-conversion with orbital angular momentum (OAM) entanglement.
D M Carberry +11 more
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Rotating optical tweezers [PDF]
SPIE Proceedings, 2005 Several methods to rotate and align microscopic particles controllably have been developed. Control of the orientation of a trapped particle allows full three dimensional manipulation, whereas rotating particles are tools for the development of optically-driven micromachines. It has been shown that the orientation of an object in the laser trap depends
Wolfgang Singer +4 more
openaire +1 more source
, 2015 We experimentally demonstrate trapping a microdroplet with an optical tweezer and then enabling it as a microresonator by bringing it close to a tapered fiber coupler.
Carmon, Tal +2 more
core +1 more source
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
openaire +2 more sources
Polygonal micro-whirlpools induced in ferrofluids
, 2015 We report on the observation of the polygonal whirlpools in the thin layer of ferrofluid under illumination with a laser beam carrying optical vortex and in the presence of a vertical magnetic field. This kind of structures have attracted attention after
Bacia, Marcin +4 more
core +1 more source
, 2020 Three-dimensional harmless contactless manipulation and assembly of micro-objects and micro-organisms would open new horizons in microrobotics and microbiology, e.g. for microsystems assembly or tissue engineering. In our previous work [Gong and Baudoin,
Baudoin, Michael, Gong, Zhixiong
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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
openaire +2 more sources
Spatially selective manipulation of cells with single-beam acoustical tweezers
Nature Communications, 2020 Acoustical tweezers can exert forces several orders of magnitude greater than optical tweezers but the absence of spatial selectivity and their limited resolution has prevented their use for many applications in microbiology.
Michael Baudoin +9 more
doaj +1 more source