Polarization singularity anisotropy: determining monstardom

C points, that is isolated points of circular polarization in transverse fields of varying polarization, are classified morphologically into three distinct types, known as lemons, stars and monstars. These morphologies are interpreted here according to two natural parameters associated with the singularity, namely the anisotropy of the C point, and the polarization azimuth on the anisotropy axis. In addition to providing insight into singularity morphology, this observation applies to the densities of the various morphologies in isotropic random polarization speckle fields.Comment: 3 pages, 2 figures, Optics Letters styl

Polarization resolved angular patterns in nematic liquid crystal cells

We study the angular structure of polarization of light transmitted through a nematic liquid crystal (NLC) cell by theoretically analyzing the polarization state as a function of the incidence angles. For a uniformly aligned NLC cell, the $4\times 4$ matrix formalism and the orthogonality relations are used to derive the analytical expressions for the transmission and reflection matrices. The polarization resolved angular patterns in the two-dimensional projection plane are characterized in terms of the polarization singularities: C points (points of circular polarization) and L lines (lines of linear polarization). In the case of linearly polarized plane waves incident on the homeotropically aligned cell, we present the results of detailed theoretical analysis describing the structure of the polarization singularities. We apply the theory to compute the polarization patterns for various orientational structures in the NLC cell and discuss the effects induced by the director orientation and biaxiality.Comment: pdflatex, rextex4, 22 pages, 7 figures (jpeg

Распространение поверхностных поляритонов в структурах с графеновым слоем

The paper considers the process of diffraction of an electromagnetic wave at the interface "vacuum – metal – nonlinear layer (graphene) – semiconductor" with the excitation of a surface wave. Within the framework of the theory, a modal method for calculating the process of interaction of radiation with a multilayer structure is presented, which makes it possible to calculate the energy fluxes arising in the process of diffractionВ работе рассмотрен процесс дифракции электромагнитной волны на границе раздела "вакуум – металл – нелинейная плёнка (графен) – полупроводник" с возбуждением поверхностной волны. В рамках теории представлен модовый метод расчета процесса взаимодействия излучения с многослойной структурой, позволяющий рассчитывать потоки энергий, возникающие в процессе дифракци