Results 51 to 60 of about 1,828,977 (180)
Rotational Doppler Effect of Vector Beams
PhotonicsThe optical rotational Doppler effect occurs when vortex beams are scattered by rotating objects and demonstrate the Doppler frequency shifts in scattered beams, which are associated with the optical angular momentum of vortex beams and the relative ...
Hehe Li, Dong Xu, Xinzhong Li
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Optical Helicity of Light in the Tight Focus
Photonics, 2023 Using the Richards–Wolf formalism, we obtain explicit analytical expressions for the optical helicity density at the tight focus of four different light beams: a linearly polarized optical vortex, an optical vortex with right-handed circular polarization,
Alexey A. Kovalev +2 more
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Real-Time Phase Conjugation of Vector Vortex Beams [PDF]
ACS Photonics, 2019 Vector vortex beams have played a fundamental role in the better understanding of coherence and polarization. They are described by spatially inhomogeneous polarization states, which present a rich optical mode structure that has attracted much attention for applications in optical communications, imaging, spectroscopy and metrology.
André G. de Oliveira +6 more
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Laser–Material Interactions of High-Quality Ultrashort Pulsed Vector Vortex Beams
Micromachines, 2021 Diffractive multi-beams based on 1 × 5 and 2 × 2 binary Dammann gratings applied to a spatial light modulator (SLM) combined with a nanostructured S-wave plate have been used to generate uniform multiple cylindrical vector beams with radial and azimuthal
Yue Tang +6 more
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, 2014 Negative radiation forces act opposite to the direction of propagation, or net momentum, of a beam but have previously been challenging to definitively demonstrate.
Démoré, Christine E.M. +10 more
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Broadband Vortex Beam Modulating System Based on Electrically Controlled Liquid Crystal Devices
Photonics, 2023 Vortex beams with helical phase wavefronts have recently emerged as a research hotspot because of their widespread applications such as ultra-high dimensional information encoding, quantum entanglement, and data transmission due to their unique ...
Xinyi Zhou +5 more
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Femtosecond vector vortex laser ablation in tungsten: chiral nano-micro texturing and structuring [PDF]
ORCID 0009-0004-5354-3030We demonstrate laser-induced periodic surface structure (LIPSS) formation on tungsten with femtosecond vector vortex laser ablation for the first time, and investigate the properties of vector vortex LIPSS by contrasting its ...
YASUHARA, Ryo +8 more
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Transformations of structurally stable states of spiral beams subjected to sector perturbations
Компьютерная оптика, 2021 We investigated conditions for the violation of the structural stability of a spiral beam subject to sector perturbations. Based on the method of computer simulation and measurement of mode spectra, we have shown that a spiral vortex beam has a ...
A.V. Volyar , Ya.E. Akimova
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Modelling and Analysis of Vector and Vector Vortex Beams Reflection for Optical Sensing [PDF]
PhotonicsLight Detection and Ranging (LiDAR) sensors can precisely determine object distances using the pulsed time of flight (TOF) or amplitude-modulated continuous wave (AMCW) TOF methods and velocity using the frequency-modulated continuous wave (FMCW) approach.
Wangke Yu, Jize Yan
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Distributed lock-in drives broadband vortex-induced vibrations of a long flexible cylinder in shear flow [PDF]
, 2013 A slender flexible body immersed in sheared cross-flow may exhibit vortex-induced vibrations (VIVs) involving a wide range of excited frequencies and structural wavenumbers.
Triantafyllou, Michael S. +2 more
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