On Terahertz laser pulse propagation in negative index metamaterials

The nonlinear propagation of a terahertz laser pulse propagation in the resonant region of a negative index meta-material is investigated. The resonant frequency of a split ring resonator (SRR), comprosing the negative index metamaterial, is calculated to be in the order of terahertz. The analysis s...

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Bibliografski detalji
Glavni autor:	Mofiz, U. A.
Format:	Članak
Jezik:	English
Izdano:	BRAC University 2014
Teme:	Meta-material Negative refractive index Bright and dark solitons
Online pristup:	http://hdl.handle.net/10361/3151

id	10361-3151
record_format	dspace
spelling	10361-31512019-09-30T04:26:17Z On Terahertz laser pulse propagation in negative index metamaterials Mofiz, U. A. Meta-material Negative refractive index Bright and dark solitons The nonlinear propagation of a terahertz laser pulse propagation in the resonant region of a negative index meta-material is investigated. The resonant frequency of a split ring resonator (SRR), comprosing the negative index metamaterial, is calculated to be in the order of terahertz. The analysis shows that the negative refractive index in SRR is maintained within a narrow band of the frequency, which is more narrowed down with the intensity of the laser radiation. From Maxwell’s system of equations, a system of coupled equations descring the nonlinear propagation of laser pulse in negative index metamaterials is obtained. The system of the coupled equations are solved analytically in the high frequency and in the low frequency responses. In the high frequency response, a nonlinear field dependent dispersion relation is obtained, and the corresponding group velocity is determined. In the low frequency response, introducing the Lorentz invariant stretched coordinates, a system of coupled nonlinear Schrödinger equations (NLSE) are obtained. Considering the equal intensities of electric and magnetic fields of the laser pulse, the coupled NLSE equations are solved , which shows that the laser radiation creates bright and dark optical solitons, respectively, before and after a critical frequency, within the narrow band, determined by the intensity of the laser radiation. The instability of the bright soliton is investigated while the dark soliton is modulationally stable. 2014-04-05T17:49:34Z 2014-04-05T17:49:34Z 2013 Article http://hdl.handle.net/10361/3151 en BRAC University Journal, BRAC University;Vol. 10, No. 1 & 2, 2013, p. 13-29 application/pdf BRAC University
institution	Brac University
collection	Institutional Repository
language	English
topic	Meta-material Negative refractive index Bright and dark solitons
spellingShingle	Meta-material Negative refractive index Bright and dark solitons Mofiz, U. A. On Terahertz laser pulse propagation in negative index metamaterials
description	The nonlinear propagation of a terahertz laser pulse propagation in the resonant region of a negative index meta-material is investigated. The resonant frequency of a split ring resonator (SRR), comprosing the negative index metamaterial, is calculated to be in the order of terahertz. The analysis shows that the negative refractive index in SRR is maintained within a narrow band of the frequency, which is more narrowed down with the intensity of the laser radiation. From Maxwell’s system of equations, a system of coupled equations descring the nonlinear propagation of laser pulse in negative index metamaterials is obtained. The system of the coupled equations are solved analytically in the high frequency and in the low frequency responses. In the high frequency response, a nonlinear field dependent dispersion relation is obtained, and the corresponding group velocity is determined. In the low frequency response, introducing the Lorentz invariant stretched coordinates, a system of coupled nonlinear Schrödinger equations (NLSE) are obtained. Considering the equal intensities of electric and magnetic fields of the laser pulse, the coupled NLSE equations are solved , which shows that the laser radiation creates bright and dark optical solitons, respectively, before and after a critical frequency, within the narrow band, determined by the intensity of the laser radiation. The instability of the bright soliton is investigated while the dark soliton is modulationally stable.
format	Article
author	Mofiz, U. A.
author_facet	Mofiz, U. A.
author_sort	Mofiz, U. A.
title	On Terahertz laser pulse propagation in negative index metamaterials
title_short	On Terahertz laser pulse propagation in negative index metamaterials
title_full	On Terahertz laser pulse propagation in negative index metamaterials
title_fullStr	On Terahertz laser pulse propagation in negative index metamaterials
title_full_unstemmed	On Terahertz laser pulse propagation in negative index metamaterials
title_sort	on terahertz laser pulse propagation in negative index metamaterials
publisher	BRAC University
publishDate	2014
url	http://hdl.handle.net/10361/3151
work_keys_str_mv	AT mofizua onterahertzlaserpulsepropagationinnegativeindexmetamaterials
_version_	1814307898252066816

On Terahertz laser pulse propagation in negative index metamaterials

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