Results 231 to 240 of about 1,697 (260)

The dielectric constant of a lattice of polarisable spheres

Journal of Physics A: Mathematical and General, 1980
The response of a simple cubic lattice of spacing L with a polarisable sphere of polarisability alpha at each vertex to a permanent dipole mu at one vertex deep within the lattice is evaluated.
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Conduction and dielectric polarisation in proteins and molecular complexes

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1981
For wealky conducting materials such as proteins and certain molecular solids the charge-transport mechanism often involves the phonon-assisted hopping of charge carriers between localised sites. It is shown here that for such materials a direct relationship exists between the steady-state conductivity and the relaxation time of the dielectric ...
Stephen Bone, Joyce Eden, Peter R. C. Gascoyne, Ronald Pethig   +3 more
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Polarisation insensitive multifunctional metasurfaces based on all-dielectric nanowaveguides

Nanoscale, 2018
This work presents multifunctional metasurfaces for generating focused optical vortices of visible light.
Nasir Mahmood, Inki Kim, Muhammad Qasim Mehmood, Heonyeong Jeong, Ali Akbar, Dasol Lee, Murtaza Saleem, Muhammad Zubair, Muhammad Sabieh Anwar, Farooq Ahmad Tahir, Junsuk Rho   +10 more
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Molecular Polarisation of Solutes and Dielectric Constant of Solvents

Nature, 1935
EXPERIMENTALLY it is indicated that the different total polarisations shown by the same solute when dissolved in different solvents are to be related to alterations in the orientation polarisations (0P) caused by replacement of one dielectric environment by another, the atomic and electronic polarisations being constant throughout such changes ...
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Polarisation-dependent dielectric processes in ferroelectric liquid crystals

Liquid Crystals, 2018
ABSTRACTThe behaviour of dielectric relaxation process has been investigated in four ferroelectric liquid crystal (FLC) materials having different spontaneous polarisation (Ps) values. Ps effect on the permittivity in four different FLCs has been carried out in highly anchored sample cells around ~8 μm thick.
Ambika Bawa, Lokesh K. Gangwar, Aastha Dhingra, Amit Choudhary, null Rajesh, Surinder P. Singh, Wolfgang Haase, Ashok M. Biradar   +7 more
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Core polarisation in the dielectric response of simple metals

Solid State Communications, 1983
Abstract The lowest core binding energy of a number of simple metals is close to the plasmon energy of the valence electrons. As a consequence the dielectric properties of these systems for ω of order of ωp are determined by the dynamics of both the valence- and the core electrons and by their mutual interaction.
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Linear and circular polarised cylindrical dielectric resonator antennas

IEEE MTT/ED/AP/LEO Societies Joint Chapter. United Kingdom and Republic of Ireland Section. 1996 2nd High Frequency Postgraduate Student Colloquium, 2002
A circular polarised and a switchable cylindrical dielectric resonator antenna are reported. The switchable antenna provides two linear polarised, one circular polarised, and a non-radiating mode. The experimental results of the resonant frequency, boresight axial ratio, gain, unloaded Q-factor, impedance bandwidth and radiation efficiency for both the
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Circular polarisation in ridge and dielectric loaded ridge waveguides

2000
An important concept in microwave engineering is that of circular polarisation. The two possibilities correspond to two equal vectors in space quadrature with one or the other advanced or retarded in time quadrature. Counter-rotating magnetic fields occur naturally on either side of the symmetry plane of an ordinary rectangular waveguide propagating ...
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Dielectric Metasurfaces for Unconventional Polarisation Control

Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF), 2018
Shaun Lung, Kai Wang, Andrey A. Sukhorukov   +2 more
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Dielectric tensor of photoinduced polarisation converters in optical fibres [PDF]

, 1993
We show that unusual forms of dielectric tensor, leading to novel polarisation convertors, can be induced in fibers by interferometric exposure to orthogonally polarized UV beams.
Kamal, A., Russell, P.St.J.
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