Results 261 to 270 of about 2,043,473 (299)

Resonant Nonlinear Absorption in Zn-Phthalocyanines

The Journal of Physical Chemistry A, 2008
In this work, we investigate the nonlinear absorption dynamics of Zn phthalocyanine in dimethyl sulfoxide (DMSO). We used single pulse and pulse train Z-scan techniques to determine the dynamics and absorption cross-sections of singlet and triplet states at 532 nm. The excited singlet state absorption cross-section was determined to be 3.2 times higher
L, De Boni, E, Piovesan, L, Gaffo, C R, Mendonça   +3 more
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Nonlinear refraction at the absorption edge in InAs

Optics Letters, 1984
The results of measurements of nonlinear refraction at the absorption edge in InAs between 68 and 90 K taken with an HF laser are compared with those of a band-gap resonant model in which the contribution of the light-hole band is included and found to account for more than 40% of the observed nonlinear refraction.
C D, Poole, E, Garmire
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Absorption of shocks in nonlinear autoregressive models

Computational Statistics & Data Analysis, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dick van Dijk, Philip Hans Franses, H. Peter Boswijk   +2 more
openaire   +4 more sources

Nonclassical Symmetries for Nonlinear Diffusion and Absorption

Studies in Applied Mathematics, 1995
Nonclassical symmetry methods are used to study the nonlinear diffusion equation with a nonlinear source. In particular, exponential and power law diffusivities are examined and we obtain mathematical forms of the source term which permit nonclassical symmetry reductions.
Arrigo, D. J., Hill, J. M.
openaire   +1 more source

Nonlinear PML for absorption of nonlinear electromagnetic waves

1997 IEEE MTT-S International Microwave Symposium Digest, 2002
Nonlinear time-domain numerical modeling requires the development of absorbing boundary conditions to effectively absorb the nonlinear electromagnetic waves. In this paper, based on Berenger's PML (1994), the nonlinear perfectly matched layer (nPML) absorbing condition is developed and implemented in the recently proposed TLM-based FDTD method ...
null Jian-Guo Ma, null Jian Xu, null Zhizhang Chen   +2 more
openaire   +1 more source

Nonlinear-optical energy regulation by nonlinear refraction and absorption in silicon

Optics Letters, 1984
We demonstrate a new silicon picosecond nonlinear-optical energy regulator for 1-microm radiation. The device has a high transmission for low input energies and a low transmission for high input energies and clamps the output at a constant value. We attribute this optical Zener action to nonlinear refraction and absorption induced in the silicon by the
T F, Boggess, S C, Moss, I W, Boyd, A L, Smirl   +3 more
openaire   +2 more sources

Nonlinear Absorption in Organic Dyes

MRS Proceedings, 1994
AbstractThe non-linear optical properties of chloro-aluminium phthalocyanine and 1,3,3,1′,3′,3′- hexamethylindotricarbocyanine have been studied as model systems using z-scan and time resolved experimental techniques. Excited state lifetimes and absorption cross sections have been measured as well as the spectral response of the induced absorption ...
K. R. Welford, S. N. R. Swatton, S. Hughes, S. J. Till, G. Spruce, R. C. Hollins, B. S. Wherrett   +6 more
openaire   +1 more source

Hybrid materials for nonlinear absorption

SPIE Proceedings, 2005
Alkynyl platinum derivatives and thiacalixarenes were trapped in solid transparent matrices prepared by the sol-gel process. By using functionalyzed silicon alkoxides, molecular species were grafted to the gel matrix giving a high doping concentration and chemically stable materials.
Stephane Parola, Marcus Öertenblad, Frédéric Chaput, Cédric Desroches, Philippe Miele, Patrice L. Baldeck, Eva Malmström, Mikael Lindgren, Bertil Eliasson, Anders Eriksson, Cesar Lopes   +10 more
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Nonlinear absorption in organometallic materials

SPIE Proceedings, 2006
We report results of two ongoing investigations that seek to characterize the photophysics of organometallic complexes under one- and two-photon excitation. In the first line of investigation we explore the properties of the triplet state in a complex that contains four individual platinum-acetylide chromophores linked via a tetraphenylmethane unit.
Kye-Young Kim, Kirk S. Schanze
openaire   +1 more source

Nonlinear Absorption in Multimode Waveguides

Frontiers in Optics 2010/Laser Science XXVI, 2010
The energy-dependent absorption of multimode waveguides with strongly nonlinear cores has been studied experimentally and numerically. The presence of a discrete set of waveguide modes is found to substantially lower the nonlinear threshold.
Armand Rosenberg, Steven R. Flom, Richard G. S. Pong, James S. Shirk   +3 more
openaire   +1 more source