Results 81 to 90 of about 253,553 (277)

Varifocal Meta‐Lens for Multifunctional Focusing and Imaging

Advanced Science, EarlyView.
A varifocal meta‐lens enables dynamic switching between conventional focusing and non‐diffracting autofocusing beams, relying on a phase design with dual interpretations in both real space and the spatial frequency domain. By integrating a Moiré‐based tuning mechanism, the system achieves continuous focal length control in both modes.
Rong Lin, Jin Yao, Chen Chen, Jiajun Wu, Junxiao Zhou, Zhihui Wang, Din Ping Tsai   +6 more
wiley   +1 more source

Enhancement the Agglutination of Erythrocytes in Blood Typing Test by Acousto-Optic Technique

مجلة النهرين للعلوم الهندسية, 2020
A proposed modern technique for determination the blood group typing by monitoring the agglutination of red blood cells using acousto-optical technique and digital camera.
Farah Mohammed Ali, Jamal A. Hasan, Eman Ghadhban Khalil   +2 more
doaj   +1 more source

Linear and Two‐Dimensional Infrared Spectroscopy of the Multifunctional Vibrational Probe, 3‐(4‐Azidophenyl) Propiolonitrile. Deperturbing a Fermi Triad by Isotopic Substitution

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Linear infrared spectroscopy combined with isotope labeling and density functional theory unravels the origin of a Fermi triad in a multifunctional vibrational chromophore. Ultrafast 2DIR‐spectroscopy reports directly on the dynamics and the intramolecular vibrational energy flow pathways in the isotopically deperturbed system. Abstract Infrared probes
Claudia Gräve, Jörg Lindner, Stefan Flesch, Luis I. Domenianni, Peter Vöhringer   +4 more
wiley   +1 more source

AI‐Enhanced High‐Resolution Functional Imaging Reveals Trap States and Charge Carrier Recombination Pathways in Perovskite

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
We use AI‐enhanced intensity modulation two‐photon excited fluorescence microscopy (ml‐IM2PM) to investigate defect properties and charge carrier recombination in MAPbBr3 films. Mapping exciton generation rate, trap concentration, and trap energy barriers and correlating spatially resolved charge carrier recombination pathways, we identify the ...
Qi Shi, Tönu Pullerits
wiley   +1 more source

Transitionless quantum drivings for the harmonic oscillator

, 2009
Two methods to change a quantum harmonic oscillator frequency without transitions in a finite time are described and compared. The first method, a transitionless-tracking algorithm, makes use of a generalized harmonic oscillator and a non-local potential.
A Ruschhaupt, Barnett A M, Berry M V, Berry M V, Bize S, I Lizuain, J G Muga, Muga J G, Orszag M, Rezek Y, S Ibáñez, Tuchman A K, X Chen   +12 more
core   +1 more source

Microfluidic‐ and Field‐Assisted 3D Printing: Leveraging Fluidic Control, Electrokinetic Phenomena, and Other Physical Fields to Advance Additive Manufacturing

ELECTROPHORESIS, EarlyView.
ABSTRACT Three‐dimensional (3D) printing has revolutionized manufacturing by enabling the rapid fabrication of complex structures, yet conventional 3D techniques remain constrained by inherent limitations in resolution, speed, and multi‐material integration.
Guillermo Ramirez‐Alvarado, Gongchen Sun   +1 more
wiley   +1 more source

Comprehensive Imaging of Sensory-Evoked Activity of Entire Neurons Within the Awake Developing Brain Using Ultrafast AOD-Based Random-Access Two-Photon Microscopy

Frontiers in Neural Circuits, 2020
Determining how neurons transform synaptic input and encode information in action potential (AP) firing output is required for understanding dendritic integration, neural transforms and encoding.
Kelly D. R. Sakaki, Kaspar Podgorski, Tristan A. Dellazizzo Toth, Patrick Coleman, Kurt Haas   +4 more
doaj   +1 more source

Fluorescence Lifetime Imaging Techniques—A Review on Principles, Applications and Clinical Relevance

Journal of Biophotonics, EarlyView.
This article gives an overview of the most frequently used fluorescence‐lifetime imaging (FLIM) techniques, their capabilities and typical applications in biology and clinical studies. ABSTRACT This article gives an overview of the most frequently used fluorescence‐lifetime imaging (FLIM) techniques, their capabilities, and typical applications ...
V. I. Shcheslavskiy, M. V. Shirmanova, K. S. Yashin, A. C. Rück, M. C. Skala, W. Becker   +5 more
wiley   +1 more source

Germanium Single Crystals for Photonics

Crystals
Germanium (Ge) is a system-forming material of IR photonics for the atmospheric transparency window of 8–14 µm. For optics of the 3–5 µm range, more widespread silicon (Si), which has phonon absorption bands in the long-wave region, is predominantly used.
Grigory Kropotov, Vladimir Rogalin, Ivan Kaplunov   +2 more
doaj   +1 more source

Lensless acousto-optical convolver

Electronics Letters, 1978
A lensless acousto-optical convolver has been realised with surface acoustic waves, which relies on a technique of polarisation discrimination detection of the diffracted light. A polariser may, then, filter the light signal directly in the Fresnel field, thus allowing realisation of a strictly compact device that retains properties of easy adjustment ...
Alippi A, Palma A, Palmieri L, Sociono G, Verona E   +4 more
openaire   +3 more sources