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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: The dynamics of the sol-gel transition is probed by use of quasielastic light scattering, and a type of critical dynamics is observed that is associated with a divergent friction, rather than a singularity in a thermodynamic quantity.
Abstract: The dynamics of the sol-gel transition is probed by use of quasielastic light scattering. A type of critical dynamics is observed that is associated with a divergent friction, rather than a singularity in a thermodynamic quantity. Several novel effects are reported, including power-law time decay of the intensity autocorrelation function, critical slowing down of the average relaxation time, and observation of a fractal time set in the scattered field.

180 citations

Journal ArticleDOI
TL;DR: In this article, the correlation between the tip radius of the probe, signal strength, spatial resolution, and sample material was studied for linear light scattering in apertureless scanning near-field optical microscopy.
Abstract: For linear light scattering in apertureless scanning near-field optical microscopy, we have studied the correlations between the tip radius of the probe, signal strength, spatial resolution, and sample material. Pronounced variations of the near-field distance dependence on tip shape and dielectric function of the sample are observed. For very sharp metal tips, the scattered near-field signal decays on a 5 nm length scale. Despite this highly localized tip–sample coupling, the contrast is found to depend sensitively on the vertical composition of the sample on a length scale given by the penetration depth of the incident light. The resulting implications on the use of the technique as an analytic probe method are discussed.

180 citations

Journal ArticleDOI
TL;DR: In this paper, a method to tailor the reflection and scattering of terahertz (THz) waves in an anomalous manner by using 1-bit coding metamaterials is presented.
Abstract: Arbitrary control of terahertz (THz) waves remains a significant challenge although it promises many important applications. Here, a method to tailor the reflection and scattering of THz waves in an anomalous manner by using 1-bit coding metamaterials is presented. Specific coding sequences result in various THz far-field reflection and scattering patterns, ranging from a single beam to two, three, and numerous beams, which depart obviously from the ordinary Snell's law of reflection. By optimizing the coding sequences, a wideband THz thin film metamaterial with extremely low specular reflection, due to the scattering of the incident wave into various directions, is demonstrated. As a result, the reflection from a flat and flexible metamaterial can be nearly uniformly distributed in the half space with small intensity at each specific direction, manifesting a diffuse reflection from a rough surface. Both simulation and experimental results show that a reflectivity less than −10 dB is achieved over a wide frequency range from 0.8 to 1.4 THz, and it is insensitive to the polarization of the incident wave. This work reveals new opportunities arising from coding metamaterials in effective manipulation of THz wave propagation and may offer widespread applications.

180 citations

Journal ArticleDOI
TL;DR: In this article, it was shown that if the distance between monomers is much less then λ, the shift of optical resonances is governed by only interaction in the near-zone, and the spectral width of resonances, on the contrary, by interaction in all zones (near, intermediate and far-zone).
Abstract: The coupled-dipole approximation is used to study theoretically the scattering of light from an infinite linear one-dimensional chain of monomers interacting via dipole fields. It is shown that if the distance between monomers is much less then λ, the shift of optical resonances is governed by only interaction in the near-zone, and the spectral width of resonances, on the contrary, by interaction in all zones (near, intermediate and far-zone). The condition under which the developed theory yields correct depolarization coefficients of a dielectric cylinder in a quasi-static case is found. The extinction cross-section is calculated as a function of driving frequency.

180 citations

Journal ArticleDOI
TL;DR: Anisotropic non-conservative scattering in modified Schuster-Schwarzschild approximation and Venus cloud layer was used in this article, where anisotropic scattering was applied to a modified version of the Schuster and Schwarzschild approximation.
Abstract: Anisotropic nonconservative scattering in modified Schuster-Schwarzschild approximation and Venus cloud layer

180 citations


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