Results 81 to 90 of about 53,610 (191)

Plasmonic Tweezers towards Biomolecular and Biomedical Applications

Applied Sciences, 2019
With the capability of confining light into subwavelength scale, plasmonic tweezers have been used to trap and manipulate nanoscale particles. It has huge potential to be utilized in biomolecular research and practical biomedical applications.
Xue Han, Changsen Sun
doaj   +1 more source

Direct observation of the effects of spin dependent momentum of light in optical tweezers

APL Photonics, 2020
We demonstrate that tight focusing of a circularly polarized Gaussian beam in optical tweezers leads to spin-momentum locking—with the transverse momentum density (Poynting vector) being helicity-dependent, while the transverse spin angular momentum ...
Debapriya Pal, Subhasish Dutta Gupta, Nirmalya Ghosh, Ayan Banerjee   +3 more
doaj   +1 more source

Gray molasses cooling of ^{39}K atoms in optical tweezers

Physical Review Research, 2022
Robust cooling and nondestructive imaging are prerequisites for many emerging applications of neutral atoms trapped in optical tweezers, such as their use in quantum information science and analog quantum simulation.
Jackson Ang'ong'a, Chenxi Huang, Jacob P. Covey, Bryce Gadway   +3 more
doaj   +1 more source

Measuring storage and loss moduli using optical tweezers: broadband microrheology

, 2009
We present an experimental procedure to perform broadband microrheological measurements with optical tweezers. A generalised Langevin equation is adopted to relate the time-dependent trajectory of a particle in an imposed flow to the frequency-dependent ...
Cooper, Jonathan M., Evans, R. M. L., Gibson, Graham M., Padgett, Miles J., Tassieri, Manlio, Warren, Rebecca, Yao, Alison M.   +6 more
core   +1 more source

Surface optical vortices [PDF]

, 2009
It is shown how the total internal reflection of orbital-angular-momentum-endowed light can lead to the generation of evanescent light possessing rotational properties in which the intensity distribution is firmly localized in the vicinity of the surface.
D. L. Andrews, D. L. Andrews, L. Allen, L. Allen, M. Babiker, V. E. Lembessis   +5 more
core   +1 more source

An atom-by-atom assembler of defect-free arbitrary 2d atomic arrays

, 2016
Large arrays of individually controlled atoms trapped in optical tweezers are a very promising platform for quantum engineering applications. However, to date, only disordered arrays have been demonstrated, due to the non-deterministic loading of the ...
Barredo, Daniel, Browaeys, Antoine, de Léséleuc, Sylvain, Lahaye, Thierry, Lienhard, Vincent   +4 more
core   +3 more sources

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, Timo A. Nieminen, Ursula J. Gibson, Norman R. Heckenberg, Halina Rubinsztein-Dunlop   +4 more
openaire   +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

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, Héctor, Burgos, Ángel, García-Cabañes, Mercedes, Carrascosa, Alfonso, Blázquez-Castro, Fernando, Agulló-López   +5 more
openaire   +2 more sources

Optical Nanotweezers Based on All-Dielectric Resonant Structures

Advanced Devices & Instrumentation
Optical tweezers are a valuable tool for manipulating micro- and nano-objects due to their noncontact and nondestructive nature. These features render them highly valuable for applications such as biological detection and precision measurement.
Hongyang Xu, Xi Xie, Siwei Chen, Yanan Fu, Yuquan Zhang, Xiaocong Yuan, Changjun Min   +6 more
doaj   +1 more source