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

doi:10.1088/1674-1056/22/3/034205

中国物理B ›› 2013, Vol. 22 ›› Issue (3): 34205-034205.doi: 10.1088/1674-1056/22/3/034205

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

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

钟先琼, 程科, 向安平

College of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China

收稿日期:2012-07-21 修回日期:2012-09-18 出版日期:2013-02-01 发布日期:2013-02-01
基金资助:
Project supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No. 210186) and the Scientific Research Foundation of Chengdu University of Information Technology, China (Grant Nos. 2010d1 and J201117).

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

Zhong Xian-Qiong (钟先琼), Cheng Ke (程科), Xiang An-Ping (向安平)

College of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China

Received:2012-07-21 Revised:2012-09-18 Online:2013-02-01 Published:2013-02-01
Contact: Zhong Xian-Qiong E-mail:zxqlxh@yeah.net
Supported by:
Project supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No. 210186) and the Scientific Research Foundation of Chengdu University of Information Technology, China (Grant Nos. 2010d1 and J201117).

摘要/Abstract

摘要： 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.

关键词: modulation instability (MI), negative-refractive metamaterial (MM), saturable nonlinearity, higher-order dispersion

Abstract: 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.

Key words: modulation instability (MI), negative-refractive metamaterial (MM), saturable nonlinearity, higher-order dispersion

中图分类号: (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)

42.65.Sf

42.65.Tg (Optical solitons; nonlinear guided waves) 42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)

钟先琼, 程科, 向安平. Impacts of higher-order dispersions and saturable nonlinearities on modulation instability in negative-refractive metamaterials[J]. 中国物理B, 2013, 22(3): 34205-034205.

Zhong Xian-Qiong (钟先琼), Cheng Ke (程科), Xiang An-Ping (向安平). Impacts of higher-order dispersions and saturable nonlinearities on modulation instability in negative-refractive metamaterials[J]. Chin. Phys. B, 2013, 22(3): 34205-034205.

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

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

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