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Czechoslovak Journal of Physics

Dynamics of propagation of radiation through random media: Slow or fast, weak or strong permittivity fluctuations and coupling of modes

Jan Peřina, Vlasta Peřinová

Published May 1, 1976• 2 citations
Publisher
DOI
10.1007/bf01586882

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Surface polaritons (SP) are electromagnetic waves that propagate near the interface of two media with electric field amplitudes strongly decaying with distance from the interface. The two media could be left-handed with both the electric permittivity and magnetic permeability being negative. These media give us new possibilities of slow light control [1,2]. Here we propose to control SP mode propagation in left-handed materials using SP-SP induced transparency. In the proposed scheme, the spatially confined SP interacts with three level lambda type atoms near the surface. An expression for the complex absorption coefficient in the presence of additional control SP mode is derived. We demonstrate a new specific spectral behavior of the probe SP mode propagation that are determined by the spatial properties of interaction between the SP modes and three level atoms. Optimal conditions for the SP mode control will be discussed.

International Conference on Quantum Information•Jan 1, 2008•0 citations
Abstract Slow light with electromagnetically induced transparency (EIT) in the core of optical fibre containing three-level atoms is investigated. The guided modes are treated in the weakly guiding approximation which renders the analysis into a manageable form. The transparency window and permittivity profile of the core due to the strong pump field in the EIT scheme is calculated. For a specific permittivity profile of the core due to EIT, the propagation constant of the weak signal field and spatial shape of fundamental guided mode are calculated by solving the vector wave equation using the finite difference method. It is found that the transparency window and slow light field can be controlled via the optical fibre parameters. The reduced group velocity of slow light in this configuration is useful for many technological applications such as optical memories, effective control of single photon fields, optical buffers and delay lines.
Slow light with electromagnetically induced transparency (EIT) in the core of cylindrical waveguide (CW) for an optical fiber system containing three-level atoms is investigated. The CW modes are treated in the weakly guiding approximation which renders the analysis into manageable form. The transparency window and permittivity profile of the waveguide due to the strong pump field in the EIT scheme is calculated. For a specific permittivity profile of the waveguide due to EIT, the propagation constant of the weak signal field and spatial shape of fundamental guided mode are calculated by solving the vector wave equation using the finite difference method. It is found that the transparency window and slow light field can be controlled via the CW parameters. The reduced group velocity of slow light in this configuration is useful for many technological applications such as optical memories, effective control of single photon fields, optical buffer and delay line.
Surface polaritons (SP) are electromagnetic waves that propagate near the interface of two media with electric field amplitudes strongly decaying with distance from the interface. The two media could be left-handed with both the electric permittivity and magnetic permeability being negative. These media give us new possibilities of slow light control [1,2]. Here we propose to control SP mode propagation in left-handed materials using SP-SP induced transparency. In the proposed scheme, the spatially confined SP interacts with three level lambda type atoms near the surface. An expression for the complex absorption coefficient in the presence of additional control SP mode is derived. We demonstrate a new specific spectral behavior of the probe SP mode propagation that are determined by the spatial properties of interaction between the SP modes and three level atoms. Optimal conditions for the SP mode control will be discussed.