Results 21 to 30 of about 2,230,771 (150)

Trapping performance of holographic optical tweezers generated with different hologram algorithms

AIP Advances, 2021
Quantitative measurement of small forces and small displacement using holographic optical tweezers (HOTs) is finding increasing applications due to the features of non-contact and high accuracy manipulation. Although hologram optimization algorithms have
M. R. He, Y. S. Liang, P. R. Bianco, Z. J. Wang, X. Yun, Y. N. Cai, K. Feng, M. Lei   +7 more
doaj   +1 more source

Simulation of superresolution holography for optical tweezers [PDF]

, 2008
Optical tweezers manipulate microscopic particles using foci of light beams. Their performance is therefore limited by diffraction. Using computer simulations of a model system, we investigate the application of superresolution holography for two ...
Thomson, L.C., Boissel, Yannick, Yao, E., Thomson, Laura C., Yannick Boissel, Eric Yao, Johannes Courtial, Yao, Eric, Laura C Thomson, Courtial, J., Whyte, G., Graeme Whyte, Whyte, Graeme, Courtial, Johannes, Boissel, Y.   +14 more
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Micro-Dumbbells—A Versatile Tool for Optical Tweezers

Micromachines, 2018
Manipulation of micro- and nano-sized objects with optical tweezers is a well-established, albeit still evolving technique. While many objects can be trapped directly with focused laser beam(s), for some applications indirect manipulation with tweezers ...
Weronika Lamperska, Sławomir Drobczyński, Michał Nawrot, Piotr Wasylczyk, Jan Masajada   +4 more
doaj   +1 more source

Single-Cell Elasticity Measurement with an Optically Actuated Microrobot

Micromachines, 2020
A cell elasticity measurement method is introduced that uses polymer microtools actuated by holographic optical tweezers. The microtools were prepared with two-photon polymerization. Their shape enables the approach of the cells in any lateral direction.
István Grexa, Tamás Fekete, Judit Molnár, Kinga Molnár, Gaszton Vizsnyiczai, Pál Ormos, Lóránd Kelemen   +6 more
doaj   +1 more source

Optically controlled grippers for manipulating micron-sized particles [PDF]

, 2007
We report the development of a joystick controlled gripper for the real-time manipulation of micron-sized objects, driven using holographic optical tweezers (HOTs).
Barron, L., Padgett, Miles, Miles Padgett, Beck, F., Louise Barron, Gibson, G., Gibson, Graham, Fiona Beck, Whyte, G., Graham Gibson, Padgett, M., Graeme Whyte, Beck, Fiona, Whyte, Graeme, Barron, Louise   +14 more
core   +1 more source

Positioning Accuracy in Holographic Optical Traps

Micromachines, 2021
Spatial light modulators (SLMs) have been widely used to achieve dynamic control of optical traps. Often, holographic optical tweezers have been presumed to provide nanometer or sub-nanometer positioning accuracy.
Frederic Català-Castro, Estela Martín-Badosa   +1 more
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.
Gibson, G. M., Miles, M.J, Carberry, D. M., Ikin, L, Gibson, G.M, Miles, M. J., Padgett, M.J., Miles, M.J., padgett, M.J, Gibson, G.M., Carberry, D.M, Ikin, L., Carberry, D.M., Padgett, M. J.   +13 more
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Optically driven liquid crystal droplet rotator

Scientific Reports, 2022
In this study, the rotation of liquid crystal droplets induced by elliptically polarized laser light was investigated using optical tweezers. The rotation mechanism was analyzed based on the arrangement of liquid crystal molecules within the droplets ...
Keita Saito, Yasuyuki Kimura
doaj   +1 more source

Simulated holographic three-dimensional intensity shaping of evanescent-wave fields [PDF]

, 2008
The size of bright structures in traveling-wave light fields is limited by diffraction. This in turn limits a number of technologies, for example, optical trapping.
Thomson, L.C., Mazilu, M., Courtial, J., Thomson, Laura C., Whyte, G., Mazilu, Michael, Whyte, Graeme, Courtial, Johannes   +7 more
core   +1 more source

Creating tunable lateral optical forces through multipolar interplay in single nanowires

Nature Communications, 2023
The concept of lateral optical force (LOF) is of general interest in optical manipulation as it releases the constraint of intensity gradient in tightly focused light, yet such a force is normally limited to exotic materials and/or complex light fields ...
Fan Nan, Francisco J. Rodríguez-Fortuño, Shaohui Yan, Jack J. Kingsley-Smith, Jack Ng, Baoli Yao, Zijie Yan, Xiaohao Xu   +7 more
doaj   +1 more source