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Saturday, May 16, 2020 | History

2 edition of Anisotropy of the optical polarisation field in liquids. found in the catalog.

Anisotropy of the optical polarisation field in liquids.

M. Ramanadham

Anisotropy of the optical polarisation field in liquids.

by M. Ramanadham

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  • 15 Currently reading

Published in (Brookville) .
Written in English


Edition Notes

From Proceedings of the Indian Academy of Sciences, 1:5.

ContributionsIndian Academy of Sciences.
The Physical Object
Paginationp. 281-287 ;
Number of Pages287
ID Numbers
Open LibraryOL19330733M

Anisotropic fluids are widespread, ranging from liquid crystals used in displays to ordered states of a biological cell interior. Optical trapping is potentially a powerful technique in the. An aerial display scheme consisting of an orthogonal circular polarization grating (OCPG), a waveplate, a retroreflector array (RRA), and a right-angle prism (RAP) was developed. Because of the OCPG’s functionality, retroreflected light from the RRA is transmitted through the RAP boundary surface by avoiding the total reflection condition. The proposed system can potentially increase optical.

In particular, surface polarization is shown to be responsible for a strong optical anisotropy in silicon ellipsoids, much more pronounced with respect to the case in which only quantum Author: Fabio Trani.   Stress dependence of the optical anisotropy of Ba K Fe 2 As 2 at T of the optical reflectivity (R(ω)) at 10 K for the p-loop experiment after a ZPC Cited by: 1.

  Advances in the manipulation of single atoms and neutral nano-objects by optical fields reflect our natural aspiration to deepen the control and understanding of matter 1,2,3,ncing the Cited by: Fluorescence Anisotropy (Polarization) Study molecular orientation and mobility Measurement of steady-state and particularly time-resolved fluorescence anisotropy offers fascinating possibilities to study molecular orientation and mobility as well as processes that affect them.


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Anisotropy of the optical polarisation field in liquids by M. Ramanadham Download PDF EPUB FB2

The theory of the anisotropic polarisation field developed by Raman and Krishnan has been applied to calculate the refractivities of a number of organic vapours from the known refractive indices in the liquid by: 3. theory, viz., the assumption of a spherically symmetrical local polarisation field.

They have suggested that the local polarisation field should be regarded generally as anisotropic and it is the purpose of the present paper to see if better agreement between the observed and calculated values could. tile optical polarisation field surrounding a liquid molecule should, in general, be regarded as anisotropic.

In the present paper, it is proposed to calculate the constants, which constitute a measure of such an anisotropy. These results indicate that the optical polarisation field is anisotropic in the former three liquids whereas it is isotropic in the case of CCl4.

The molecular refractivity is found to increase with temperature in CS2, C6H6 and C6H14 : B. Sundara Rama Rao. the temperature of the molar refractivities and the anisotropic coefficients of the optical polarisation field in some typical non-associating liquids has been studied.

A brief discussion was given on the significance of the results to the subject of light-scattering. In this part, it is proposed to extend the. the optical polarisation field surrounding a liquid molecule should, in general, be regarded as anisotropic. In the present paper, it is proposed to calculate the constants, which constitute a measure of such an anisotropy.

The coefficients of anisotropy of the optical polarisation field are calculated in the cases of acetic acid and nitrobenzene. In the former, the polarisation field becomes more and more anisotropic whereas in the latter it becomes more and more isotropic with increasing : B.

Sundara Rama Rao. From a knowledge of the molecular refractivities at different temperatures, the anisotropic constants of the optical polarisation field are calculated in CS 2, C 6 H 6 and C 6 H It is found that the polarisation field becomes more and more isotropic with increasing : B.

Sundara Rama Rao. The azimuth dependence of the polarization rotation indicates that the period of oscillation is °, suggesting that the phenomenon is attributable to the optical birefringence. They ascribed the optical birefringence to an optical anisotropy of the matrix, which was enhanced by the presence of Ag nanoparticles.

electric, optical and magnetic behaviour of liquids have shown that the optical polarisation field surrounding a liquid molecule should, in general, be regarded as anisotropic. A marked diminution in the effective optical anisotropy of certain molecules and a conspicuous failure of the well-known.

The stress deforms the isotropic arrangement of atoms in the glass, leading to a polarization-sensitive response to the incoming light. Electro-optical effect occurs when the application of external electric field brings about ionic polarization and deformation of electron clouds of constituent ions to cause an optical anisotropy in the glass.

Independent evidence for such an “anisotropy” of the polarisation field is forthcoming when we correlate the measurements on electric double-refraction and on light-scattering in the liquid state with the corresponding values for the same substance in the state of vapour, The general mathematical theory of refraction by dense media takes.

LC molecules reorient if voltages greater than the threshold voltage, V th, are applied to the a sufficient voltage value, named switching voltage V sw > V th, is applied (ON state), LC molecules align parallel to the electric field and the polarization rotation most display applications, two crossed polarizers are placed on the outside of the substrates, with the.

Anisotropy is the property of being directionally dependent, which implies different properties in different directions, as opposed to isotropy. It can be defined as a difference, when measured along different axes, in a material's physical or mechanical properties An example of anisotropy is light coming through a polarizer.

Another is wood, which is easier to split along its grain than across it. In an anisotropic medium, such as a crystal, the polarisation field P is not necessarily aligned with the electric field of the light E. In a physical picture, this can be thought of as the dipoles induced in the medium by the electric field having certain preferred directions.

The striking in-plane anisotropy remains one of the most intriguing properties for the newly rediscovered black phosphorus (BP) 2D crystals. However, because of its rather low-energy band gap, the optical anisotropy of few-layer BP has been primarily investigated in the near-infrared (NIR) regime.

Moreover, the essential physics that determine the intrinsic anisotropic optical property of few Cited by:   The polarization state of a light beam is specified by the electric field vector. In many liquid crystal devices, the liquid crystal is used to manipulate the polarization state of the light.

This chapter presents derivation for the propagation of light in uniform non‐magnetic anisotropic media. Semiconductor nanorods can emit linear-polarized light at efficiencies over 80%. Polarization of light in these systems, confirmed through single-rod spectroscopy, can be explained on the basis of the anisotropy of the transition dipole moment and dielectric confinement effects.

Here we report emission polarization in macroscopic semiconductor–polymer composite films containing CdSe/CdS Cited by: An electric field applied to the molecules of a liquid crystal causes them to alter their orientations.

This leads to changes in the optical properties of the medium, i.e., it exhibits an electro‐optic effect. The molecules of a twisted nematic liquid crystal are organized in a helical pattern so that they normally act as polarization rotators.

Anisotropy in Liquid Crystals. Prev Next: Dielectric Anisotropy in Liquid Crystals: Dielectric properties of LCs are related to the response of LC molecules to the application of an electric field. Permittivity is a physical quantity that describes how an electric field affects and is affected by a dielectric medium and is determined by the.

T.X. Liu, S. Huang, in Physical Properties and Applications of Polymer Nanocomposites, Liquid crystalline phase-induced alignment of CNTs. Liquid crystals (LCs) are anisotropic fluids, thermodynamically situated between normal isotropic liquid and three-dimensionally ordered exhibit anisotropic physical properties due to molecular self-assembly, which, in the .To cite this Article Madhusudana, N.

V.() 'Polarization Field and Orientational Order in Liquid Crystals', Molecular Crystals and Liquid Crystals, 1, — To link to this Article. Fig.

3: Tunable optical spin Hall effect in liquid crystal microcavity. Degree of circular polarization ρ C for different voltages applied to the structure: a – f, m – r measurement, g – l Cited by: 4.