scholarly journals Optical activity in the scattering of structured light

2014 ◽  
Vol 16 (47) ◽  
pp. 25819-25829 ◽  
Author(s):  
Robert P. Cameron ◽  
Stephen M. Barnett
Keyword(s):  
Light Scattering ◽  
Optical Activity ◽  
Structured Light ◽  
Plane Waves ◽  
Single Plane ◽  
Illuminating Light

We observe that optical activity in light scattering can be probed using types of illuminating light other than single plane (or quasi plane) waves and that this introduces new possibilities for the study of molecules and atoms.

OPTICAL ACTIVITY AND LIGHT SCATTERING IN HIGHLY CHIRAL LIQUID CRYSTALS

1992 ◽  
Vol 06 (08) ◽  
pp. 425-446 ◽  
Author(s):  
PETER J. COLLINGS
Keyword(s):  
Liquid Crystals ◽  
Light Scattering ◽  
Optical Activity ◽  
Smectic A ◽  
Scattering Effects ◽  
Smectic A Phase ◽  
Blue Phases ◽  
Chiral Liquid Crystals

Theoretical and experimental optical activity and light scattering work in highly chiral liquid crystals is reviewed, starting from the early studies twenty years ago and ending with the most current investigations. Pretransitional effects in the isotropic and smectic A phases of highly chiral liquid crystals are discussed, as well as optical activity and light scattering effects in both the blue phases and smectic A * phase.

scholarly journals Orientation dependence of optical activity in light scattering by nanoparticle clusters

2022 ◽  
Author(s):  
Atefeh Fazel Najafabadi ◽  
Baptiste Auguié
Keyword(s):  
Optical Properties ◽  
Light Scattering ◽  
Optical Activity ◽  
Incident Light ◽  
Spatial Arrangement ◽  
Orientation Dependence ◽  
Nanoparticle Clusters

The optical properties of nanoparticle clusters vary with the spatial arrangement of the constituent particles, but also the overall orientation of the cluster with respect to the incident light. This...

Random rays and seismic amplitude anomalies

Geophysics ◽  
1988 ◽  
Vol 53 (7) ◽  
pp. 903-907 ◽  
Author(s):  
Benjamin White ◽  
Balan Nair ◽  
Alvin Bayliss
Keyword(s):  
Plane Waves ◽  
Propagation Distance ◽  
Three Dimensions ◽  
Single Plane ◽  
Seismic Amplitude ◽  
Random Occurrence ◽  
Amplitude Anomaly ◽  
First Occurrence ◽  
Finite Distance ◽  
Homogeneous Media

We give an explanation of the phenomenon, sometimes observed in exploration seismology, of anomalously large amplitudes which seem inconsistent with the traveltime curves when the data are interpreted as resulting from reflections from smooth interfaces of piece‐wise homogeneous media. Monte Carlo simulations illustrate how this phenomenon can occur when the homogeneous media have small, smooth, random velocity fluctuations which vary on a length scale which is large compared with a wavelength but small compared with the propagation distance. Synthetic gathers of reflections from a single plane‐stratified layer with and without the random lateral inhomogeneities produce an amplitude anomaly which is related to the random occurrence of a caustic; limit theorems for stochastic differential equations provide a theory. Theoretical curves, giving the probability of first occurrence of this phenomenon along a ray as a function of propagation distance (for plane waves and for point and line sources in two and three dimensions) are qualitatively similar: they have an initial flat portion where amplitude anomalies are very unlikely, rise to a peak at the distance most likely for first occurrence, and decay exponentially to zero, thus predicting that the phenomenon will occur at some finite distance with probability one.

Optical activity and light scattering in the isotropic and smectic A* phases of a highly chiral smectic liquid crystal

1993 ◽  
Vol 14 (6) ◽  
pp. 1793-1800 ◽  
Author(s):  
Brian D. Yanoff ◽  
Andrew A. Ruether ◽  
Peter J. Collings ◽  
Andrew J. Slaney ◽  
John W. Goodby
Keyword(s):  
Liquid Crystal ◽  
Light Scattering ◽  
Optical Activity ◽  
Smectic A ◽  
Smectic Liquid Crystal

Light Scattering from Fluctuations in an Optically Active Fluid

1973 ◽  
Vol 28 (6) ◽  
pp. 805-814
Author(s):  
Kin-Wah Li ◽  
John S. Dahler
Keyword(s):  
Light Scattering ◽  
Angular Dependence ◽  
Optical Activity ◽  
Scattered Light ◽  
Monochromatic Light ◽  
Optically Active ◽  
Scattering Medium ◽  
Irreducible Components ◽  
New Feature ◽  
Scattered Fields

The theory of light scattering by fluctuations has been extended to optically active fluids. The new feature is the "gyration parameter", a second rank asymmetric tensor, the fluctuations of which must be counted along with the familiar isotropic (scalar) and anisotropic (traceless and symmetric) fluctuations of the electric permeability tensor. Scattering equations are derived and solved in order to obtain the spectrum of scattered light. It is found that the angular dependence of scattering caused by fluctuations of permeability alone does not involve the propagation vectors of the incident or scattered fields whereas that which involves fluctuations of the gyration parameter depends explicitly upon these two vectors. This gyration tensor also has distinguishable effects upon the depolarization, ellipticity, and rotation or tilt of the scattered quasi-monochromatic light. The total intensity is resolved into a sum of five distinct contributions, each associated with different irreducible components of the gyration and permeability tensors and each with a different dependence upon the scattering angle and polarizations of the incident and scattered light. Experiments are suggested which emphasize effects originating from the optical activity of the scattering medium.

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