Tunable structure and dynamics of active liquid crystals
نویسندگان
چکیده
منابع مشابه
Tunable Filters from Lyotropic Liquid Crystals
The external field influence on the birefringence of the liquid crystalline layer is expressed by using the Cauchy dispersion equation. The basically theoretical elements of the polarization interferential filters of Lyot Ohmann and Wood type, achieved in a multilayer geometry, are given in this paper. The expressions corresponding to the transmitted maxima and to the spectral bandwidths of the...
متن کاملTunable fishnet metamaterials infiltrated by liquid crystals
We analyze numerically the optical response and effective macroscopic parameters of fishnet metamaterials infiltrated with a nematic liquid crystal. We show that even a small amount of liquid crystal can provide tuning of the structures due to reorientation of the liquid crystal director. This enables switchable optical metamaterials, where the refractive index can be switched from positive to ...
متن کاملOptically tunable and rewritable diffraction grating with photoaligned liquid crystals.
An optically tunable and rewritable liquid crystal (LC) diffraction grating cell has been revealed that consists of an optically active and an optically passive alignment layer. The grating profile is created by confining the LC director distribution in alternate planar and twisted alignment domains by means of photoalignment of the LCs. The proposed grating is optically tunable for diffractive...
متن کاملTunable Photonic Structures Based on Silicon and Liquid Crystals
This paper is focused on the design, fabrication and characterization of the conventional and tunable photonic devices based on grooved silicon, serving as one-dimensional (1D) photonic crystal. The advantages of these photonic structures are as follows: the large refractive index contrast, in-plane moulding of the light flow, the possibility to fabricate a composite photonic structures by fill...
متن کاملPlasma Crystals – Structure and Dynamics∗)
This overview describes the confinement and structure of two-dimensional plasma crystals. Phonons and Mach cones in monolayer systems can be used for diagnostic purposes. Three-dimensional plasma crystals are found as multilayer systems or as Yukawa balls. The differences between Coulomb and Yukawa balls are described by means of a simple model. Optical diagnostic methods for studying dynamical...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science Advances
سال: 2018
ISSN: 2375-2548
DOI: 10.1126/sciadv.aat7779