Results 71 to 80 of about 190,833 (286)
Advanced Engineering Materials, EarlyView.High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin +4 more
wiley +1 more source
Theory of self-induced back-action optical trapping in nanophotonic systems
, 2015 Optical trapping is an indispensable tool in physics and the life sciences. However, there is a clear trade off between the size of a particle to be trapped, its spatial confinement, and the intensities required.
Chang, Darrick E. +2 more
core +1 more source
Optical Trapping of Absorbing Particles [PDF]
, 1998 Radiation pressure forces in a focussed laser beam can be used to trap microscopic absorbing particles against a substrate. Calculations based on momentum transfer considerations show that stable trapping occurs before the beam waist, and that trapping is more effective with doughnut beams.
Rubinsztein-Dunlop, H. +3 more
openaire +3 more sources
Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures
Advanced Engineering Materials, EarlyView.This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley +1 more source
Trapping and Optomechanical Sensing of Particles with a Nanobeam Photonic Crystal Cavity
Crystals, 2019 Particle trapping and sensing serve as important tools for non-invasive studies of individual molecule or cell in bio-photonics. For such applications, it is required that the optical power to trap and detect particles is as low as possible, since large ...
Lin Ren, Yunpeng Li, Na Li, Chao Chen
doaj +1 more source
Modelling of optical traps for aerosols
, 2010 Experimental observations suggest that there are differences between the behavior of particles optically trapped in air and trapped in a liquid phase.
Ashkin +37 more
core +1 more source
Advanced Engineering Materials, EarlyView.Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth +6 more
wiley +1 more source
Generalized description of the nonlinear optical force in laser trapping of dielectric nanoparticles
Physical Review Research, 2020 A general description to estimate optical trapping efficiencies for dielectric nanoparticles using dipole approximation is presented including the effect of optical nonlinearity.
Anita Devi, Arijit K. De
doaj +1 more source
JPhys Photonics, 2023 Optical tweezers are tools made of light that enable contactless pushing, trapping, and manipulation of objects, ranging from atoms to space light sails.
Giovanni Volpe +82 more
doaj +1 more source
Single ions trapped in a one-dimensional optical lattice
, 2012 We report on three-dimensional optical trapping of single ions in an optical lattice formed by two counter-propagating laser beams. We characterize the trapping parameters of the standing wave using the ion as a sensor stored in a hybrid trap consisting ...
Enderlein, Martin +3 more
core +1 more source