Results 41 to 50 of about 2,534,041 (331)
Applied Sciences, 2020 An optical tweezer composed of a strongly focused single-spatial-mode Gaussian beam of a red-detuned 1064-nm laser can confine a single-cesium (Cs) atom at the strongest point of the light intensity.
Rui Sun +4 more
doaj +1 more source
Optical Tweezers in Studies of Red Blood Cells
Cells, 2020 Optical tweezers (OTs) are innovative instruments utilized for the manipulation of microscopic biological objects of interest. Rapid improvements in precision and degree of freedom of multichannel and multifunctional OTs have ushered in a new era of ...
Ruixue Zhu +3 more
semanticscholar +1 more source
On chip shapeable optical tweezers [PDF]
Scientific Reports, 2013 Particles manipulation with optical forces is known as optical tweezing. While tweezing in free space with laser beams was established in the 1980s, integrating the optical tweezers on a chip is a challenging task. Recent experiments with plasmonic nanoantennas, microring resonators, and photonic crystal nanocavities have demonstrated optical trapping.
Renaut, C. +7 more
openaire +4 more sources
Accounting for polarization in the calibration of a donut beam axial optical tweezers. [PDF]
PLoS ONE, 2018 Advances in light shaping techniques are leading to new tools for optical trapping and micromanipulation. For example, optical tweezers made from Laguerre-Gaussian or donut beams display an increased axial trap strength and can impart angular momentum to
Russell Pollari, Joshua N Milstein
doaj +1 more source
Acousto-holographic optical tweezers
Optics Letters, 2020 Acousto-optic deflectors (AODs) allow the creation of multiple optical traps by time-sharing, that is, by rapidly cycling the laser focus between designated spatial locations. The traps thus formed are not permanent. In this Letter, we successfully demonstrate the creation of multiple and permanent traps by means of AODs driven by specially encoded ...
R. Bola +4 more
openaire +5 more sources
Manipulation of Biological Cells Using a Robot-Aided Optical Tweezers System
Micromachines, 2018 This article reviews the autonomous manipulation strategies of biological cells utilizing optical tweezers, mainly including optical direct and indirect manipulation strategies. The typical and latest achievements in the optical manipulation of cells are
Mingyang Xie +2 more
doaj +1 more source
Stretching DNA with optical tweezers [PDF]
Biophysical Journal, 1997 Force-extension (F-x) relationships were measured for single molecules of DNA under a variety of buffer conditions, using an optical trapping interferometer modified to incorporate feedback control. One end of a single DNA molecule was fixed to a coverglass surface by means of a stalled RNA polymerase complex.
Jeff Gelles +4 more
openaire +2 more sources
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 +5 more
doaj +1 more source
Alkaline-Earth Atoms in Optical Tweezers [PDF]
Physical Review X, 2018 We demonstrate single-shot imaging and narrow-line cooling of individual alkaline earth atoms in optical tweezers; specifically, strontium-88 atoms trapped in $515.2~\text{nm}$ light.
Alexandre Cooper +5 more
semanticscholar +1 more source
Absolute calibration of optical tweezers [PDF]
Applied Physics Letters, 2006 As a step toward absolute calibration of optical tweezers, a first-principles theory of trapping forces with no adjustable parameters, corrected for spherical aberration, is experimentally tested. Employing two very different setups, we find generally very good agreement for the transverse trap stiffness as a function of microsphere radius for a broad ...
P. A. Maia Neto +5 more
openaire +6 more sources