Time-domain numerical scheme based on low-order partial-fraction models for the broadband study of frequency-dispersive liquid crystals

被引：6

作者：

Prokopidis, Konstantinos P. ^{[1
]}

Zografopoulos, Dimitrios C. ^{[2
]}

机构：

[1] Aristotle Univ Thessaloniki, Dept Elect & Comp Engn, GR-54124 Thessaloniki, Greece

[2] CNR, IMM, I-00133 Rome, Italy

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2016年 / 33卷 / 04期

关键词：

PLASMONIC STRUCTURES; REFRACTIVE-INDEXES; CRITICAL-POINTS; FIBERS; MODULATION; PHOTONICS; DEVICES; RANGE; MEDIA;

D O I：

10.1364/JOSAB.33.000622

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel finite-difference time-domain formulation for the modeling of electromagnetic wave propagation in frequency-dispersive liquid crystals with random orientation is presented. The dispersion of the complex ordinary and extraordinary permittivities of nematic liquid crystals is described by a generalized model based on the sum of partial fractions. The proposed dispersive model encompasses traditional approaches, such as Drude, Drude-Lorentz, and modified-Lorentz functions; it can also capture arbitrary dispersion properties of experimentally characterized nematic mixtures via the vector fitting technique. The accuracy of the formulation is demonstrated in a series of benchmark examples in optical and terahertz frequencies. (C) 2016 Optical Society of America

引用

页码：622 / 629

页数：8