Results 201 to 210 of about 722,539 (348)

Complex Reflectivity Modulation Characteristics at Visible Wavelength Using Liquid Crystal on a Metasurface Device

open access: yesAdvanced Photonics Research, EarlyView.
A liquid crystal of twisted nematic mode on a plasmonic antenna metasurface device modulates complex reflectivity with a small voltage variation of 3.1 V on the antenna electrode and 2.5 V on the metal electrode. The largest complex modulation is at a wavelength of 660 nm with phase and reflectivity amplitude modulations of 0–2π radian and 0.3 and 0.6,
Yong‐Hae Kim   +8 more
wiley   +1 more source

High‐Fidelity Information Transmission Through the Turbulent Atmosphere Utilizing Partially Coherent Cylindrical Vector Beams

open access: yesAdvanced Photonics Research, EarlyView.
A novel free‐space optical communication protocol that combines the benefits of partially coherent light sources with the decoding capabilities of convolutional neural networks is proposed. This approach establishes a robust communication link that can withstand atmospheric turbulence.
Linxuan Yao   +6 more
wiley   +1 more source

Low‐Loss Parowax‐Imprinted Diffractive Neural Network for Orbital Angular Momentum Terahertz Holographic Imaging

open access: yesAdvanced Photonics Research, EarlyView.
This work introduces a low‐loss diffractive neural network, fabricated using an imprinting technique with parowax material, for recognizing and manipulating the topological charge of orbital angular momentum (OAM) waves. It is also demonstrated that the low‐loss diffractive network can perform mathematical operations based on the topological charges of
Wei Jia   +4 more
wiley   +1 more source

Spatially Controlled Optical Vortex Generation Using Low‐Loss Antimony Telluride Metasurfaces

open access: yesAdvanced Photonics Research, EarlyView.
The spatially varying vortex beams with the customizable propagation trajectory and the controllable topological charge evolution are demonstrated using the Sb2Te3‐based plasmonic metasurfaces. Benefiting from the dispersion‐free property of the Pancharatnam–Berry phase and the broadband response of polarization conversion efficiency of the nanobrick ...
Chengsen Yang   +11 more
wiley   +1 more source

Finite topological spaces [PDF]

open access: yesTransactions of the American Mathematical Society, 1966
openaire   +1 more source

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