Impacts of higher-order dispersions and saturable nonlinearities on modulation instability in negative-refractive metamaterials

On the basis of the standard linear stability analysis and Drude electromagnetic model,the impacts of higher-order dispersions and three kinds of typical saturable nonlinearities on modulation instability（MI） have been analyzed and calculated for negative-refractive metamaterials（MMs）.Our results sh...

Full description

Saved in:
Bibliographic Details
Published in:Chinese physics B 2013-03, Vol.22 (3), p.329-336
Main Author: 钟先琼 程科 向安平
Format: Article
Language:English
Subjects:
Controllability
Dispersions
Gain
Instability
Metamaterials
Modulation
Nonlinearity
Spectra
Stability
光谱宽度
分散体
线性稳定性分析
调制不稳定性
负折射率材料
饱和非线性
高重复频率
高阶
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:On the basis of the standard linear stability analysis and Drude electromagnetic model,the impacts of higher-order dispersions and three kinds of typical saturable nonlinearities on modulation instability（MI） have been analyzed and calculated for negative-refractive metamaterials（MMs）.Our results show that the MI gain spectra consist of only one spectral region instead of one or two regions in ordinary materials,which may be close to or far from the zero point.Particularly,the spectrum far from the zero point has a high cut-off frequency but a narrow spectral width,which is obviously beneficial to the generation of high-repetition-rate pulse trains.Moreover,MI characteristics here will vary with the normalized angular frequency which can be modified by adjusting the structures of negative-refractive MMs,signifying the controllability of bistable solitons and MI based applications.The effects of saturable nonlinearities are similar to those in ordinary materials.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/3/034205