Results 11 to 20 of about 33,097 (263)

Flat telescope based on an all-dielectric metasurface doublet enabling polarization-controllable enhanced beam steering

open access: yesNanophotonics, 2021
A flat telescope (FTS), which incorporates an all-dielectric metasurface doublet (MD) based on hydrogenated amorphous silicon nanoposts, is proposed and demonstrated to achieve flexibly magnified angular beam steering that is sensitive to both light ...
Li Hongliang   +4 more
doaj   +1 more source

Particle Motion and Plasma Effects on Gravitational Weak Lensing in Lorentzian Wormhole Spacetime

open access: yesGalaxies, 2021
Here we study particle motion in the specific Lorentzian wormhole spacetime characterized, in addition to the total mass M, with the dimensionless parameter λ.
Farruh Atamurotov   +2 more
doaj   +1 more source

The effect of laser fiber on the damage of the working channel of a flexible ureteroscope

open access: yesHeliyon, 2020
Introduction: Flexible ureteroscopy involves expensive equipment that is expensive to repair. This study aimed to investigate the effects of cleavage by various tools on the laser fiber tip and to determine the extent of damage incurred to the laser ...
Kantima Jongjitaree   +5 more
doaj   +1 more source

Effects of wall compliance and light-curing protocol on wall deflection of simulated cavities in bulk-fill composite restoration

open access: yesJournal of Dental Sciences, 2022
Background/purpose: Cuspal deflections in composite restoration have been investigated with considering wall compliance of human tooth cavity and light-curing protocol.
Chang-Ha Lee, In-Bog Lee
doaj   +1 more source

Deflection of light in equatorial plane due to Kerr-Taub-NUT body [PDF]

open access: yesSerbian Astronomical Journal, 2017
According to General Relativity, there are factors like mass, rotation, charge and presence of Cosmological constant that can influence the path of light ray.
Chakraborty Sarani, Sen A.K.
doaj   +1 more source

Design of Fast Steering Mirror Based on Displacement Amplification Mechanism

open access: yesShanghai Jiaotong Daxue xuebao, 2021
According to the current situation that the deflection angle of the piezoelectric ceramics direct drive fast steering mirror (FSM) is restricted by small elongation of piezoelectric ceramics and the large deflection angle cannot be realized, a novel ...
XIE Yong, LIU Chongfei, JIA Jianjun, DAI Jiansheng
doaj   +1 more source

Distinguishing rotating naked singularities from Kerr-like wormholes by their deflection angles of massive particles

open access: yesEuropean Physical Journal C: Particles and Fields, 2019
We study the gravitational deflection of relativistic massive particles by Janis–Newman–Winicour (JNW) spacetimes (also known as a rotating source with a surface-like naked singularity), and a rotating Kerr-like wormholes.
Kimet Jusufi   +3 more
doaj   +1 more source

LIGHT DEFLECTION IN BINARY STARS [PDF]

open access: yesThe Astronomical Journal, 2012
27 pages, 7 ...
openaire   +2 more sources

Coherent control of high efficiency metasurface beam deflectors with a back partial reflector

open access: yesAPL Photonics, 2017
Recently, coherent control of absorption in metallic metasurfaces has been demonstrated, and this phenomenon was applied to intriguing light-by-light switching operation. Here we experimentally demonstrate coherent control
Shota Kita   +6 more
doaj   +1 more source

Light bending in F[g(□)R] extended gravity theories

open access: yesPhysics Letters B, 2018
We show that in the weak field limit the light deflection alone cannot distinguish between different R+F[g(□)R] models of gravity, where F and g are arbitrary functions.
Breno L. Giacchini, Ilya L. Shapiro
doaj   +1 more source

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