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Light scattering

About: Light scattering is a research topic. Over the lifetime, 37721 publications have been published within this topic receiving 861581 citations.


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Journal ArticleDOI
TL;DR: An integration of dynamic light scattering (DLS) and optical coherence tomography (OCT) for high-resolution 3D imaging of heterogeneous diffusion and flow is introduced and a fitting algorithm is developed to estimate dynamic parameters including the axial and transverse velocities and the diffusion coefficient.
Abstract: We introduce an integration of dynamic light scattering (DLS) and optical coherence tomography (OCT) for high-resolution 3D imaging of heterogeneous diffusion and flow. DLS analyzes fluctuations in light scattered by particles to measure diffusion or flow of the particles, and OCT uses coherence gating to collect light only scattered from a small volume for high-resolution structural imaging. Therefore, the integration of DLS and OCT enables high-resolution 3D imaging of diffusion and flow. We derived a theory under the assumption that static and moving particles are mixed within the OCT resolution volume and the moving particles can exhibit either diffusive or translational motion. Based on this theory, we developed a fitting algorithm to estimate dynamic parameters including the axial and transverse velocities and the diffusion coefficient. We validated DLS-OCT measurements of diffusion and flow through numerical simulations and phantom experiments. As an example application, we performed DLS-OCT imaging of the living animal brain, resulting in 3D maps of the absolute and axial velocities, the diffusion coefficient, and the coefficient of determination.

140 citations

BookDOI
01 Jan 1991
TL;DR: Inelastic Light Scattering from Semiconductors E.C. Anastassakis et al. as mentioned in this paper proposed the use of light with acoustic waves in superlattices and related devices.
Abstract: Inelastic Light Scattering from Semiconductors E. Burstein, et al. Optic Phonons: Acoustic, Optic and Interface Phonons: Low Symmetry Superlattices M. Cardona. Raman Scattering in alpha-Sn1-xGex Alloys J. Menendez, et al. Acoustic Phonons: Interaction of Light with Acoustic Waves in Superlattices and Related Devices J. Sapriel, et al. Localized and Extended Acoustic Waves in Superlattices: Light Scattering by Longitudinal Phonons B. Djafari Rouhani, et al. Strain Related Effects: Optical Phonon Raman Scattering as a Local Probe of SiGe Strained Layers J.C. Tsang, et al. Strain Characterization of Semiconductor Structures and Superlattices E. Anastassakis. Micro Raman/Small Structures/Impurities: The Raman Line Shape of Semiconductor Nanocrystals P.M. Fauchet. Raman Scattering of IIIV and IIVI Semiconductor Microstructures M. Watt, et al. Magnetic Superlattices and IIVI Materials: Surface Modes in Magnetic Semiconductor Films and Multilayers M.G. Cottam, et al. Vibrational, Electronic, and Magnetic Excitations in IIVI Quantum Well Structures A.K. Ramdas, et al. Time Resolved Studies: Nonequilibrium Electrons and Phonons in GaAs and Related Materials J.A. Kash. 30 additional articles. Index.

140 citations

Journal ArticleDOI
TL;DR: It is demonstrated that the approximate scatter models yield surprisingly accurate results and at the same time provide insight into light scattering phenomena.
Abstract: The light scattering of rough metallic surfaces with roughness levels ranging from a few to several hundred nanometers is modeled and compared to experimental data. Different modeling approaches such as the classical Rayleigh-Rice vector perturbation theory and the new Generalized Harvey-Shack theory are used and critically assessed with respect to ranges of validity, accuracy, and practicability. Based on theoretical calculations and comparisons with Rigorous Coupled Wave Analysis for sinusoidal phase gratings, it is demonstrated that the approximate scatter models yield surprisingly accurate results and at the same time provide insight into light scattering phenomena. For stochastically rough metal surfaces, the predicted angles resolved scattering is compared to experimental results at 325 nm, 532 nm, and 1064 nm. In addition, the possibilities of retrieving roughness information from measured scattering data for different roughness regimes are discussed.

140 citations

Journal ArticleDOI
TL;DR: Mise en evidence experimentale des effets de la localisation faible dans la diffusion de the lumiere, par des mesures de retrodiffusion coherente sur un diffuseur constitue de microparticules de BaSO 4.
Abstract: We report the first observation of weak localizations effects in light scattering by a disordered solid. For a diffuse solid scatterer we predict and observe (i) multiple backscattering speckle, (ii) a coherent backscattered peak remaining after removal of this speckle by ensemble averaging, and (iii) speckle statistics which differ from those for single scattering. Computer simulations based upon the theoretical equations yield results in good agreement with experiment.

140 citations

Journal ArticleDOI
TL;DR: In this article, a theoretical approach based on the discrete dipole approximation for multipole analysis of light scattering by arbitrary-shaped nanoparticles located near or on a plane surface is presented.
Abstract: A theoretical approach, based on the discrete dipole approximation, for multipole analysis of light scattering by arbitrary-shaped nanoparticles located near or on a plane surface is presented. The obtained equations include the first multipoles up to the magnetic quadrupole and electric octupole moments. It is discussed how the suggested approach can be applied to the problem of multipole scattering of surface plasmon polaritons. As an example, the theoretical framework is used for investigation of light scattering by cylindrical Si nanoparticles located on different dielectric substrates, manifesting resonant interaction of these particles with light.

140 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023235
2022537
2021485
2020680
2019751
2018799