Results 61 to 70 of about 187,701 (187)

Enhancing Optical Gradient Forces with Metamaterials

open access: yesPhysical Review Letters, 2013
We demonstrate how the optical gradient force between two waveguides can be enhanced using transformation optics. A thin layer of double-negative or single-negative metamaterial can shrink the interwaveguide distance perceived by light, resulting in a more than tenfold enhancement of the optical force.
Ginis, Vincent   +3 more
openaire   +6 more sources

Nonlinear optical response and self-trapping of light in biological suspensions

open access: yesAdvances in Physics: X, 2020
In the past decade, the development of artificial materials exhibiting novel optical properties has become a major scientific endeavor. One particularly interesting system is synthetic soft matter, which plays a central role in numerous fields ranging ...
Rekha Gautam   +10 more
doaj   +1 more source

Experimental Study of Transverse Trapping Forces of an Optothermal Trap Close to an Absorbing Reflective Film

open access: yesPhotonics, 2022
The optothermal manipulation of micro-objects is significant for understanding and exploring the unknown in the microscale word, which has found many applications in colloidal science and life science.
Hao-Dong Wang   +5 more
doaj   +1 more source

Proposed method for highly selective resonant optical manipulation using counter-propagating light waves

open access: yesNanophotonics, 2020
Optical manipulation using electronic resonance can realize the selective manipulation of nano objects exhibiting quantum mechanical properties by confining electronic systems based on the characteristics of individual objects.
Wada Takudo   +3 more
doaj   +1 more source

Tracing optical force fields within graded-index media

open access: yesNew Journal of Physics, 2014
The mechanical interaction between light and graded index media (both isotropic and anisotropic) is presented from the geometrical optics (GO) perspective.
Alireza Akbarzadeh   +3 more
doaj   +1 more source

Probing the Casimir force with optical tweezers [PDF]

open access: yesEPL (Europhysics Letters), 2015
We propose to use optical tweezers to probe the Casimir interaction between microspheres inside a liquid medium for geometric aspect ratios far beyond the validity of the widely employed proximity force approximation. This setup has the potential for revealing unprecedented features associated to the non-trivial role of the spherical curvatures.
Ether, D. S.   +12 more
openaire   +3 more sources

The zoo of nonconservative optical forces

open access: yesJournal of Physics: Conference Series, 2018
Optical forces are usually described as conservative ones originating from intensity gradients in optical tweezers. However, the fundamental optical action on matter is nonconservative. In contrast to gradient forces, the spectrum of action of nonconservative forces is much wider: they can propel, pull, rotate objects or move objects along complicated ...
Sergey Sukhov, Sergey Sukhov
openaire   +3 more sources

High-Performance Transmissive Broadband Vortex Beam Generator Based on Pancharatnam–Berry Metasurface

open access: yesIEEE Access, 2020
Vortex beam generators, particularly those operating in transmission mode, are extremely important in modern communication systems because they are believed to be an effective way to extend the capacity of a communication channel.
Yuzhou Ran   +7 more
doaj   +1 more source

Optical Forces in Metal/Dielectric/Metal Fishnet Metamaterials in the Visible Wavelength Regime

open access: yesIEEE Photonics Journal, 2012
The optical force is calculated on a nanoparticle in close proximity to the surface of a fishnet metamaterial based on a metal/dielectric/metal film when illuminated at visible wavelengths.
Tun Cao, Lei Zhang, Martin J. Cryan
doaj   +1 more source

Enhanced Optical Forces in Plasmonic Microstructures

open access: yes, 2014
RP acknowledges a grant from the JAE-doc program co-funded by European Social Fund. This work has partially been supported by MAT2011-28345-C02-02 (Spain) projects.
Kotsifaki, Domna G.   +6 more
openaire   +4 more sources

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