Results 131 to 140 of about 27,513 (349)

Combining the Underwater Vision Profiler 6 with sediment traps to measure in situ velocity of marine particles

open access: yesLimnology and Oceanography: Methods, EarlyView.
Abstract Particles sinking from the surface to the deep ocean play a key role in the biological carbon pump, whose efficiency depends partly on sinking velocities. Over the last decade, in situ imaging has enabled critical advances in our understanding of particle dynamics in the ocean.
Manon Laget   +5 more
wiley   +1 more source

Computer Generated Holograms

open access: yes, 1975
Computer generated holograms have been made practical by the introduction of fast Fourier transform algorithms. The following discussion will brief the reader on the theory and concepts of optical holograms, the computer hologram, and the analogies of ...
Gierloff, Jeffrey James
core  

Reconfigurable optical interconnections using dynamic optoelectronic holograms

open access: yes, 2022
S.50-57Reconfigurable optical interconnection schemes are proposed and described which are based on optoelectronic holograms. Their interference patterns can be changed dynamically.
Schulze, E.
core  

Recent Advances in Photonic Bound States in the Continuum: From Fundamentals to Engineering and Implementation

open access: yesLaser &Photonics Reviews, EarlyView.
This review summarizes recent progress in meta‐photonics with a focus on bound states in the continuum (BICs) as a powerful platform for light confinement and control. It covers fundamental concepts, design strategies across optical regimes, symmetry breaking for practical quasi‐BICs, tunable and AI‐assisted BIC devices, and emerging applications in ...
Hafiz Saad Khaliq, Hak‐Rin Kim
wiley   +1 more source

Pseudocolour images with volume reflection holograms

open access: yes, 1980
A technique is described that can be used to produce pseudocolour images of three-dimensional objects, using volume phase reflection holograms. These are recorded on two photographic plates with a He-Ne laser.
P. Hariharan, Hariharan, P.
core   +1 more source

Optically Bound Rapid Plasmonic Nanorod Dimers: Anisotropic Dynamics Driven by Light‐Fluidic Cooperation

open access: yesLaser &Photonics Reviews, EarlyView.
Optically confined gold nanorods exhibit cooperative light‐driven dynamics, forming mobile end‐to‐end dimers with orientation‐dependent propulsion. Using structured laser traps and an opto‐thermo‐hydrodynamic model, we uncover how optical binding, polarization‐induced torque, and near‐surface hydrodynamics govern their motion.
José A. Rodrigo, Tatiana Alieva
wiley   +1 more source

Femtosecond laser direct nanolithography of perovskite hydration for temporally programmable holograms

open access: yesNature Communications
Modern nanofabrication technologies have propelled significant advancement of high-resolution and optically thin holograms. However, it remains a long-standing challenge to tune the complex hologram patterns at the nanoscale for temporal light field ...
Yinan Zhang   +3 more
doaj   +1 more source

Fourier holograms in Norland 65�

open access: yes, 2008
In this work it is demonstrated that they can search holograms of type Fourier in real time, utilizing photosensitive material of the polymeric Norland Optical Adhesive 65 (NOA 65 ) which, it is mixed with the violet crystal dye (CV); For the record of ...
Ortiz-Gutierrez, M.   +3 more
core   +1 more source

Pancharatnam–Berry Phase Driven by Electrical Restructuring of Liquid Crystal Polarization Grating Period

open access: yesLaser &Photonics Reviews, EarlyView.
Electrically controlled liquid‐crystal twist diffraction element based on the Pancharatnam–Berry phase enables switchable structural periodicity and simultaneous generation of orthogonal circularly polarized coherent waves for multifunctional planar photonic devices.
Elena Melnikova   +7 more
wiley   +1 more source

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