Results 11 to 20 of about 7,684 (263)

Optical Vortex Brillouin Laser

open access: yesLaser & Photonics Reviews, 2023
AbstractOptical vortices, which have been extensively studied over the last decades, offer an additional degree of freedom useful in many applications, such as optical tweezers and quantum control. Stimulated Brillouin scattering (SBS), providing a narrow linewidth and a strong nonlinear response, has been used to realize quasi‐continuous wave lasers ...
Zeng, X.   +7 more
openaire   +3 more sources

Theoretical Study on Generation of Multidimensional Focused and Vector Vortex Beams via All-Dielectric Spin-Multiplexed Metasurface

open access: yesNanomaterials, 2022
The optical vortex (OV) beams characterized by orbital angular momentum (OAM) possess ubiquitous applications in optical communication and nanoparticle manipulation.
Yue Liu   +8 more
doaj   +1 more source

Divergence of optical vortex beams [PDF]

open access: yesApplied Optics, 2015
4 pages, 4 ...
Reddy, Salla Gangi   +5 more
openaire   +3 more sources

Real-time phase measurement of optical vortex via digital holography

open access: yesFrontiers in Physics, 2023
Real-time phase measurement is of great value to study the evolution of optical vortex. However, it cannot be recorded in real time due to the limitation of the exposure time of the recording device in the experiment. Therefore, based on the temporal and
Huaibin Qiu   +5 more
doaj   +1 more source

Abrupt autofocusing performance of a circular Airyprime beam with vortex pairs

open access: yesResults in Physics, 2023
Abrupt autofocusing performance of a circular Airyprime beam (CAPB) with vortex pairs propagating in free space is investigated. Here the vortex pairs are off-axis by default.
Wen-Song Dan   +6 more
doaj   +1 more source

Collapse Dynamics of Vortex Beams in a Kerr Medium with Refractive Index Modulation and PT-Symmetric Lattices

open access: yesPhotonics, 2022
Using the two-dimensional nonlinear Schrödinger equation, the collapse dynamics of vortex beams in a Kerr medium with refractive index modulation and parity–time (PT) symmetric lattices are explored. The critical power for the collapse of vortex beams in
Gang Yao, Yuhua Li, Rui-Pin Chen
doaj   +1 more source

Vortex knots in light [PDF]

open access: yes, 2005
Optical vortices generically arise when optical beams are combined. Recently, we reported how several laser beams containing optical vortices could be combined to form optical vortex loops, links and knots embedded in a light beam (Leach et al 2004 ...
Dennis, MR   +13 more
core   +1 more source

Vortex Beam in a Turbulent Kerr Medium for Atmospheric Communication

open access: yesPhotonics, 2023
The dynamics of the topological charge of a vortex optical beam propagating in turbulent air while accounting for the cubic nonlinearity is theoretically considered.
Andrey D. Bulygin   +2 more
doaj   +1 more source

Vortex solitons in moiré optical lattices

open access: yesOptics Letters, 2023
We show that optical moiré lattices enable the existence of vortex solitons of different types in self-focusing Kerr media. We address the properties of such states both in lattices having commensurate and incommensurate geometries (i.e., constructed with Pythagorean and non-Pythagorean twist angles, respectively), in the different regimes that occur ...
Sergey K. Ivanov   +3 more
openaire   +3 more sources

Theory of Optical Trapping by an Optical Vortex Beam [PDF]

open access: yesPhysical Review Letters, 2010
We propose a theory to explain optical trapping by optical vortices (OVs), which are emerging as important tools to trap mesoscopic particles. The common perception is that the trapping is solely due to the gradient force and that it may be characterized by three real force constants.
Ng, Jack, Lin, Zhifang, Chan, Che Ting
openaire   +3 more sources

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