The Experts below are selected from a list of 167250 Experts worldwide ranked by ideXlab platform
Marc Haelterman - One of the best experts on this subject based on the ideXlab platform.
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experimental demonstration of the fermi pasta ulam recurrence in a modulationally unstable Optical Wave
Physical Review Letters, 2001Co-Authors: G Van Simaeys, Ph Emplit, Marc HaeltermanAbstract:Through a detailed spectral analysis of the propagation of square-shaped laser pulses in Optical fibers, we provide the experimental demonstration of the Fermi-Pasta-Ulam recurrence phenomenon in modulationally unstable Optical Waves ruled by the nonlinear Schroedinger equation.
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experimental demonstration of the fermi pasta ulam recurrence in a modulationally unstable Optical Wave
Physical Review Letters, 2001Co-Authors: G Van Simaeys, Ph Emplit, Marc HaeltermanAbstract:Through a detailed spectral analysis of the propagation of square-shaped laser pulses in Optical fibers, we provide the experimental demonstration of the Fermi-Pasta-Ulam recurrence phenomenon in modulationally unstable Optical Waves ruled by the nonlinear Schr\"odinger equation.
I C Khoo - One of the best experts on this subject based on the ideXlab platform.
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photo induced space charge fields photo voltaic photorefractivity and Optical Wave mixing in nematic liquid crystals
Molecular Crystals and Liquid Crystals, 1998Co-Authors: I C Khoo, Brett D Guenther, S SlussarenkoAbstract:Abstract We present a detailed discussion of the fundamental mechanisms for recently observed nonlinear electro-Optical Wave mixing effects in nematic liquid crystal films. Experimental results on photoconductivity, photorefractive-like two beam coupling, beam amplification, self-diffraction, and storage holographic grating formation in dye- and Fullerene C60 and C61 doped nematic films are presented along with a review of two- and four- Wave mixing theories. Nematic liquid crystal films are shown to be potentially useful for adaptive and Optical storage applications.
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transient multiWave mixing and diffraction with nonsinusoidal intensity dependent index grating in a nonlinear medium
Journal of The Optical Society of America B-optical Physics, 1997Co-Authors: Peter G Lopresti, I C KhooAbstract:We study the effects of an intensity dependence in the nonlinear index change coefficient on transient and steady-state Optical Wave mixing and self-diffractions, using the temperature-dependent thermal index change of a nematic liquid crystal as a model material. We show that the nonsinusoidal index grating created by a sinusoidal Optical intensity grating has significant influence on the phases and amplitudes of the multiWave mixing processes. Experimental results on the intensity distribution of the multiorder diffractions in a nematic liquid-crystal film near the phase transition temperature are also presented to illustrate the basic effects.
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orientational photorefractive effects in nematic liquid crystal films
IEEE Journal of Quantum Electronics, 1996Co-Authors: I C KhooAbstract:We present a detailed theoretical discussion of the fundamental mechanisms for the recently observed nonlinear electro-Optical effects in nematic liquid crystal films. Detailed expressions for the three principal mechanisms for space charge fields formation and various dielectric, conductivity and flow induced torques that are responsible for the liquid crystal director axis reorientation process are derived. We have observed strong Optical Wave mixing effects such as two-beam energy coupling and self-diffraction; the observed effects, their magnitude and dynamics, and dependencies on various physical parameters are found to be in good agreement with theories.
Ph Emplit - One of the best experts on this subject based on the ideXlab platform.
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experimental demonstration of the fermi pasta ulam recurrence in a modulationally unstable Optical Wave
Physical Review Letters, 2001Co-Authors: G Van Simaeys, Ph Emplit, Marc HaeltermanAbstract:Through a detailed spectral analysis of the propagation of square-shaped laser pulses in Optical fibers, we provide the experimental demonstration of the Fermi-Pasta-Ulam recurrence phenomenon in modulationally unstable Optical Waves ruled by the nonlinear Schroedinger equation.
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experimental demonstration of the fermi pasta ulam recurrence in a modulationally unstable Optical Wave
Physical Review Letters, 2001Co-Authors: G Van Simaeys, Ph Emplit, Marc HaeltermanAbstract:Through a detailed spectral analysis of the propagation of square-shaped laser pulses in Optical fibers, we provide the experimental demonstration of the Fermi-Pasta-Ulam recurrence phenomenon in modulationally unstable Optical Waves ruled by the nonlinear Schr\"odinger equation.
Masahiro Tanaka - One of the best experts on this subject based on the ideXlab platform.
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simulation of confined and enhanced Optical near fields for a long narrow aperture in a pyramidal structure on a thick metallic screen
Journal of The Optical Society of America A-optics Image Science and Vision, 2004Co-Authors: Kazuo Tanaka, Masahiro TanakaAbstract:A new type of long narrow aperture in a pyramidal structure on a thick metallic screen is proposed, and Optical Wave scattering by this structure is simulated. This aperture structure provides high emission intensity and small spot size simultaneously through excitation of the surface plasmon polaritons on the sidewalls of the pyramidal structure. Scattering of Optical Waves by this structure in the thick metallic screen is solved numerically with a volume integral equation by generalized conjugate residual iteration and fast Fourier transformation. The basic characteristics of the near-field intensities of the aperture are investigated in detail.
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simulation of an aperture in the thick metallic screen that gives high intensity and small spot size using surface plasmon polariton
Journal of Microscopy, 2003Co-Authors: Kazuo Tanaka, Masahiro TanakaAbstract:The Optical Wave behaviour around a subWavelength aperture in a thick metallic screen is examined through three-dimensional computer simulation. Treating the metallic screen as a dielectric slab with complex-valued permittivity, it is possible to design an aperture that simultaneously provides high intensity and small spot size through the excitation of surface plasmon polaritons on the side walls of the aperture.
G Van Simaeys - One of the best experts on this subject based on the ideXlab platform.
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experimental demonstration of the fermi pasta ulam recurrence in a modulationally unstable Optical Wave
Physical Review Letters, 2001Co-Authors: G Van Simaeys, Ph Emplit, Marc HaeltermanAbstract:Through a detailed spectral analysis of the propagation of square-shaped laser pulses in Optical fibers, we provide the experimental demonstration of the Fermi-Pasta-Ulam recurrence phenomenon in modulationally unstable Optical Waves ruled by the nonlinear Schr\"odinger equation.