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相关论文: Polarization resolved angular patterns in nematic …

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A variety of intriguing polarization patterns are created when polarization observations of the single pulses from radio pulsars are displayed in a two-dimensional projection of the Poincare sphere. In many pulsars, the projections produce…

天体物理学 · 物理学 2011-02-11 Mark M. McKinnon

We show that the mechanical effect of light on the orientational ordering of the crystalline axis of a mesophase can be used to control the dynamics of the optical response of liquid crystal infiltrated photonic structures. The…

软凝聚态物质 · 物理学 2015-05-18 A. E. Miroshnichenko , E. Brasselet , D. O. Krimer , Yu. S. Kivshar

We solve the three-dimensional time-dependent Schr\"{o}dinger equation for a few-cycle circularly polarized femtosecond laser pulse interacting with an oriented target exemplified by an Argon atom, initially in a $3\text{p}_{x}$ or…

原子物理 · 物理学 2015-05-18 C. P. J. Martiny , M. Abu-samha , L. B. Madsen

One of the central experimental efforts in nematic colloids research aims to explore how the interplay between the geometry of particles along with the accompanying nematic director deformations and defects around them can provide a means…

软凝聚态物质 · 物理学 2016-12-28 Bohdan Senyuk , Manoj B. Pandey , Qingkun Liu , Mykola Tasinkevych , Ivan I. Smalyukh

We study theoretically the instabilities induced by a linearly polarized ordinary light wave incident at a small oblique angle on a thin layer of homeotropically oriented nematic liquid crystal with special emphasis on the dye-doped case.…

软凝聚态物质 · 物理学 2010-01-29 D. O. Krimer , G. Demeter , L. Kramer

We present an approach to electronic polarization in molecular solids treated as a set of quantum systems interacting classically. Individual molecules are dealt with rigorously as quantum-mechanical systems subject to classical external…

凝聚态物理 · 物理学 2009-11-07 E. V. Tsiper , Z. G. Soos

In the presence of an electric dipole coupling of t-tbar to a photon, and an analogous "weak" dipole coupling to the Z, CP violation in the process e+e- --> t tbar results in modified polarization of the top and anti-top. This polarization…

高能物理 - 唯象学 · 物理学 2008-11-26 Saurabh D. Rindani

The polarisation of cells and tissues is fundamental for tissue morphogenesis during biological development and regeneration. A deeper understanding of biological polarity pattern formation can be gained from the consideration of pattern…

细胞行为 · 定量生物学 2017-10-23 Karl B. Hoffmann , Anja Voss-Böhme , Jochen C. Rink , Lutz Brusch

We observe a sequence of the anchoring transitions in nematic liquid crystals (NLC) sandwiched between the hydrophobic polyimide substrates treated with the plasma beam. There is a pronounced continuous transition from homeotropic to low…

材料科学 · 物理学 2009-11-13 Oleg V. Yaroshchuk , Alexei D. Kiselev , Ruslan M. Kravchuk

Electro-hydrodynamic phenomena in liquid crystals constitute an old but still very active research area. The reason is that these phenomena play the key role in various applications of liquid crystals and due to the general interest of…

软凝聚态物质 · 物理学 2024-03-14 E. S. Pikina , A. R. Muratov , E. I. Kats , V. V. Lebedev

Combining molecular dynamics and Monte Carlo simulation we study defect structures around an elongated colloidal particle embedded in a nematic liquid crystal host. By studying nematic ordering near the particle and the disclination core…

软凝聚态物质 · 物理学 2009-11-07 D. Andrienko , M. P. Allen , G. Skacej , S. Zumer

In uniaxial soft matter with a reorientational nonlinearity, such as nematic liquid crystals, a light beam in the extraordinary polarization walks off its wavevector due to birefringence, while it undergoes self-focusing via an increase in…

Topological defects play a pivotal role in the physics of liquid crystals and represent one of the most prominent and well studied aspects of mesophases. While in two-dimensional nematics, disclinations are traditionally treated as…

软凝聚态物质 · 物理学 2016-07-28 Arthur J. Vromans , Luca Giomi

This paper explores different photo-bending shapes in polydomain nematic glass. The motivation is to explain the phenomenon in experiment [1] under polarized light in which a nematic film curls into an circular arc, like part of a…

材料科学 · 物理学 2016-05-24 Chen Xuan , Changwei Xu , Yongzhong Huo

We present both experimentally and theoretically the transformation of radially and azimuthally polarized vector beams when they propagate through a biaxial crystal and are transformed by the conical refraction phenomenon. We show that, at…

Many objects on the sky exhibit a centrosymmetric polarization pattern, particularly in cases involving single scattering around a central source. Utilizing a novel liquid crystal device (the ``theta cell'') that transforms the coordinate…

天体物理仪器与方法 · 物理学 2009-03-17 Frans Snik

We present the first numerical radiative transfer simulation of multiple light scattering in dust configurations containing aligned non-spherical (spheroidal) dust grains. Such models are especially important if one wants to explain the…

天体物理学 · 物理学 2009-11-07 S. Wolf , N. V. Voshchinnikov , Th. Henning

A linear-to-circular polarization converter with half transmission and half reflection using a single-layered metamaterial is theoretically and numerically demonstrated. The unit cell of the metamaterial consists of two coupled split-ring…

光学 · 物理学 2014-12-17 Yasuhiro Tamayama , Kanji Yasui , Toshihiro Nakanishi , Masao Kitano

We studied the optical properties of a dielectric photonic crystal structure with spirals arranged in a hexagonal lattice. The dielectric constant of the material is 9 and the filling ratio is 15.2%. We found that this kind of structure…

光学 · 物理学 2009-11-11 Jeffrey Chi Wai Lee , C. T. Chan

A line photon incident in an electron-scattering medium is transferred in a diffusive way both in real space and in frequency space, and the mean number of scatterings changes as the wavelength shifts from the line center. This leads to the…

天体物理学 · 物理学 2009-10-31 Hee-Won Lee