Tunable photonic crystals based on MnFe2O4 magnetic fluids by magnetic fields

被引：24
|
作者：
Pu, Shengli [1 ]
Liu, Ming [1 ]
机构：
[1] Shanghai Univ Sci & Technol, Coll Sci, Shanghai 200093, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 481卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Magnetically ordered materials; Optical properties; Microstructure; ORDERED STRUCTURES; REFRACTIVE-INDEX; FILMS; PHYSICS; STATES; RODS;
D O I：
10.1016/j.jallcom.2009.03.131
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The model of photonic crystals (PCs) formed in magnetic fluids under externally magnetic fields is established and the mechanisms of tunability are expounded. The magnetic-field-dependent structure ratio and refractive index contrast of the photonic crystals are derived from the experimental data about the structures and refractive indices for a MnFe2O4 magnetic fluid under externally magnetic fields. Band diagram calculations display the tunability of the forbidden bands with magnetic field strength for both TE and TM modes. Furthermore, the number of the forbidden bands for the TE mode increases with the magnetic field strength. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：851 / 854
页数：4
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