Results 41 to 50 of about 855,719 (327)
Forces in Kerr spacetimes with a repulsive cosmological constant [PDF]
, 2006 Forces defined in the framework of optical reference geometry are introduced in the case of stationary and axially symmetric Kerr black-hole and naked-singularity spacetimes with a repulsive cosmological constant.
Abramowicz M. A. +7 more
core +2 more sources
Lorentz force optical coherence elastography [PDF]
Journal of Biomedical Optics, 2016 Quantifying tissue biomechanical properties can assist in detection of abnormalities and monitoring disease progression and/or response to a therapy. Optical coherence elastography (OCE) has emerged as a promising technique for noninvasively characterizing tissue biomechanical properties.
Chen, Wu +7 more
openaire +2 more sources
Momentum-Topology-Induced Optical Pulling Force [PDF]
Physical Review Letters, 2020 We report an ingenious mechanism to obtain robust optical pulling force by a single plane wave via engineering the topology of light momentum in the background. The underlying physics is found to be the topological transition of the light momentum from a usual convex shape to a starlike concave shape in the carefully designed background, such as a ...
Hang Li +12 more
openaire +3 more sources
Chiral discrimination in optical binding [PDF]
, 2015 The laser-induced intermolecular force that exists between two or more particles in the presence of an electromagnetic field is commonly termed “optical binding.” Distinct from the single-particle forces that are at play in optical trapping at the ...
D. L. Andrews +7 more
core +1 more source
Optical forces in optical nanofibers
Journal of Physics: Conference Series, 2018 Optical forces exerted upon the endface of optical nanofiber have been carefully investigated numerically. Detailed spatial optical force distributions along the fiber axis are obtained. Dependence of optical force on fiber diameters, input modal polarizations, oblique-cut endfaces are carefully taken into considerations.
Y Zhang, H Yu, Z Li
openaire +1 more source
Casimir–Lifshitz Force Based Optical Resonators [PDF]
The Journal of Physical Chemistry Letters, 2019 We theoretically investigate the building of optical resonators based on the levitation properties of thin films subjected to strong repulsive Casimir-Lifshitz forces when immersed in an adequate medium and confronted with a planar substrate. We propose a design in which cavities supporting high Q-factor optical modes at visible frequencies can be ...
Victoria Esteso +2 more
openaire +5 more sources
Optical Manipulation of Lanthanide-Doped Nanoparticles: How to Overcome Their Limitations
Frontiers in Chemistry, 2020 Since Ashkin's pioneering work, optical tweezers have become an essential tool to immobilize and manipulate microscale and nanoscale objects. The use of optical tweezers is key for a variety of applications, including single-molecule spectroscopy ...
Elisa Ortiz-Rivero +4 more
doaj +1 more source
Zeptonewton force sensing with nanospheres in an optical lattice [PDF]
, 2016 Optically trapped nanospheres in high-vaccum experience little friction and hence are promising for ultra-sensitive force detection. Here we demonstrate measurement times exceeding $10^5$ seconds and zeptonewton force sensitivity with laser-cooled silica
Casey, Kirsten +3 more
core +3 more sources
Polarization‐Dependent Optical Forces Arising from Fano Interference
Advanced Physics Research, 2023 A Fano resonance originates from the resonant coupling between interacting multipoles inside nanostructures. It breaks the symmetry of spectral line shape and enables Fano‐resonant media to present unusual scattering properties.
Yao Zhang +4 more
doaj +1 more source
Shape-induced force fields in optical trapping [PDF]
, 2014 Advances in optical tweezers, coupled with the proliferation of two-photon polymerization systems, mean that it is now becoming routine to fabricate and trap non-spherical particles.
A Ashkin +48 more
core +2 more sources