| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Propagation of Gaussian beams family through a Kerr-type left-handed metamaterial |
| A. Keshavarz, M. Naseri |
| Department of Physics, Shiraz University of Technology, Shiraz, Iran |
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Abstract In this paper the propagation of elegant Hermite-cosh-Gaussian, elegant Laguerre Gaussian, and Bessel Gaussian beams through a Kerr left-handed metamaterial (LHM) slab have been studied. A split-step Fourier method is used to investigate the propagation of laser beams through this media. Numerical simulation shows that Gaussian beams have different focusing behaviors in a Kerr LHM slab with positive or negative nonlinearity. Beam focusing happens in slabs with positive nonlinearity and not in slabs with negative nonlinearity; however, negative nonlinearity is required for a Kerr LHM slab to act like a lens. Additionally, the focusing properties of beams can be controlled by controlling the thickness of the slab or the input power of the incident beam. A multilayer structure is also proposed to have beam focusing by thinner slabs and passing longer distances.
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Received: 23 June 2014
Revised: 09 August 2014
Accepted manuscript online:
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PACS:
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42.65.-k
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(Nonlinear optics)
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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42.65.Jx
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(Beam trapping, self-focusing and defocusing; self-phase modulation)
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Corresponding Authors:
A. Keshavarz
E-mail: Keshavarz@sutech.ac.ir
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Cite this article:
A. Keshavarz, M. Naseri Propagation of Gaussian beams family through a Kerr-type left-handed metamaterial 2015 Chin. Phys. B 24 044207
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