Results 41 to 50 of about 53,610 (191)

Optical skipping rope induced transverse OAM for particle orbital motion parallel to the optical axis

Nanophotonics, 2023
In structured light tweezers, it is a challenging technical issue to realize the complete circular motion of the trapped particles parallel to the optical axis.
Zhu Liuhao, Zhang Xiaohe, Rui Guanghao, He Jun, Gu Bing, Zhan Qiwen   +5 more
doaj   +1 more source

Computational toolbox for optical tweezers in geometrical optics

, 2014
Optical tweezers have found widespread application in many fields, from physics to biology. Here, we explain in detail how optical forces and torques can be described within the geometrical optics approximation and we show that this approximation ...
Callegari, Agnese, Gököz, A. Burak, Mijalkov, Mite, Volpe, Giovanni   +3 more
core   +1 more source

Optical Tweezers in Human Cancers

Zhongliu Fangzhi Yanjiu
Optical tweezers are a means to manipulate objects with light. Optical tweezers can obtain a nanometer space, piconewton force, and a millisecond resolution; thus, they are excellently suited for studying biological processes from the single-cell to the ...
ZHANG Baihong, YUE Hongyun
doaj   +1 more source

Calibration of trap stiffness and viscoelasticity in polymer solutions [PDF]

, 2008
We present an experimental demonstration of a method using optical tweezers proposed by Fischer and Berg-Sorensen for measuring viscoelasticity using optical tweezers.
Alvarez-Elizondo, Martha B., Heckenberg, Norman, Nieminen, Timo A., Persson, Martin, Roelofs, Susan H., Rubinsztein-Dunlop, Halina   +5 more
core   +1 more source

Optical Assembling of Micro-Particles at a Glass–Water Interface with Diffraction Patterns Caused by the Limited Aperture of Objective

Applied Sciences, 2018
Optical tweezers can manipulate micro-particles, which have been widely used in various applications. Here, we experimentally demonstrate that optical tweezers can assemble the micro-particles to form stable structures at the glass–solution interface in ...
Min-Cheng Zhong, Ai-Yin Liu, Rong Zhu
doaj   +1 more source

Computer-Generated Holographic Optical Tweezer Arrays

, 2000
Holographic techniques significantly extend the capabilities of laser tweezing, making possible extended trapping patterns for manipulating large numbers of particles and volumes of soft matter.
Dearing, Matthew T., Dufresne, Eric R., Grier, David G., Sheets, Steven A., Spalding, Gabriel C.   +4 more
core   +1 more source

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 and dual fiber nano-tip optical tweezers: trapping and analysis

, 2013
An original optical tweezers using one or two chemically etched fiber nano-tips is developed. We demonstrate optical trapping of 1 micrometer polystyrene spheres at optical powers down to 2 mW.
Decombe, Jean-Baptiste, Fick, Jochen, Huant, Serge   +2 more
core   +4 more sources

Optical Trapping and Manipulation of Superparamagnetic Beads Using Annular-Shaped Beams

Methods and Protocols, 2018
We propose an optical tweezers setup based on an annular-shaped laser beam that is efficient to trap 2.8 μ m-diameter superparamagnetic particles.
Leandro Oliveira, Warlley H. Campos, Marcio S. Rocha   +2 more
doaj   +1 more source

Design of Optical Tweezers Manipulation Control System Based on Novel Self-Organizing Fuzzy Cerebellar Model Neural Network

Applied Sciences, 2022
Holographic optical tweezers have unique non-physical contact and can manipulate and control single or multiple cells in a non-invasive way. In this paper, the dynamics model of the cells captured by the optical trap is analyzed, and a control system ...
Jing Zhao, Hui Hou, Qi-Yu Huang, Xun-Gao Zhong, Peng-Sheng Zheng   +4 more
doaj   +1 more source