نتایج جستجو برای: electrostriction
تعداد نتایج: 212 فیلتر نتایج به سال:
The effect of electron irradiation on the ferroelectric properties ofLangmuir-Blodgett films of the copolymer poly(vinylidene fluoride-trifluoroethylene) isinvestigated using 1.26 MeV electrons with dosages from 16 to 110 Mrad. Films wereirradiated in the ferroelectric state to investigate the effect of defect introduction inultrathin films. Electron irradiation is known to ...
We study two aspects of the elasticity of smectic- A elastomers that make these materials genuinely and qualitatively different from conventional uniaxial rubbers. Under strain applied parallel to the layer normal, monodomain smectic- A elastomers exhibit a drastic change in Young's modulus above a threshold strain value of about 3%, as has been measured in experiments by [Nishikawa and Finkelm...
We studied physical properties of the monolayers and bilayer lipid membranes (BLM) formed by calix[6]arene carboxylic acid derivative (CX) and its mixtures with diphytanoylphosphatidylcholine (DPhPC) by means of measurement surface pressure, surface dipole potential and electrostriction. CX forms stable monolayers at an air-water interface and complexes in mixed monolayers contained DPhPC. Cali...
Three theories are outlined to explain the observed forces in fluids. A system-atical analysis, via a number of appropriate experiments with liquids, shows that only one of them is substantially correct. A new method for studying the electrostriction in liquids is presented. Although the technological importance of the electromagnetic forces in fluids seems to be rather secondary, it has been a...
We develop a general framework of evaluating the Stimulated Brillouin Scattering (SBS) gain coefficient in optical waveguides via the overlap integral between optical and elastic eigen-modes. This full-vectorial formulation of SBS coupling rigorously accounts for the effects of both radiation pressure and electrostriction within micro- and nano-scale waveguides. We show that both contributions ...
Electrostriction, the deformation of dielectric materials under influence an electric field, is continuous interest in optics. The classic experiment by Hakim and Higham [Proc. Phys. Soc. 80, 190 (1962)] for a stationary field supports different formula electrostrictive force density than recent Astrath et al. [Light Sci. Appl. 11, 103 (2022)] optical field. In this work, we study origin differ...
This paper presents the derivation of the homogenized equations for the macroscopic 5 response of elastic dielectric composites containing space charges (i.e., electric source terms) that 6 oscillate rapidly at the length scale of the microstructure. The derivation is carried out in the setting 7 of small deformations and moderate electric fields by means of a two-scale asymptotic analysis. 8 T...
If the rotational symmetry of single mode (S.M.) fiber is disturbed, either during manufacturing or through some external perturbation the polarization modes have different propagation constant. Due to this generated birefringence, the linear polarized light through S.M. fiber is distributed in two orthogonal eigenmodes. As a result, the state of polarization (SOP) is changed at the exit end of...
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