نتایج جستجو برای: nonlinear scattering

تعداد نتایج: 329845  

Journal: :journal of sciences, islamic republic of iran 2010
n mansour

in this study, the nonlinear optical properties and optical limiting performance of the silver nanoparticles (agnps) in distilled water are investigated. the nonlinear absorption coefficient of the colloid is measured by the z-scan technique. the optical limiting behavior of the agnp suspension is investigated under exposure to nanosecond laser pulses at 532 nm. the results show that nonlinear ...

N Mansour

In this study, the nonlinear optical properties and optical limiting performance of the silver nanoparticles (AgNPs) in distilled water are investigated. The nonlinear absorption coefficient of the colloid is measured by the Z-scan technique. The optical limiting behavior of the AgNP suspension is investigated under exposure to nanosecond laser pulses at 532 nm. The results show that nonlinear ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشکده علوم پایه 1386

چکیده ندارد.

Journal: :SIAM Journal of Applied Mathematics 1998
Dale P. Winebrenner John Sylvester

In this paper we discuss one dimensional scattering and inverse scattering for the Helmholtz equation on the half line from the point of view of the layer stripping. By full or nonlinear scattering, we mean the transformation between the index of refraction (actually half of its logarithmic derivative) and the reflection coefficient. We refer to this mapping as nonlinear scattering, because the...

Journal: :Advanced photonics 2023

Scattering of waves, e.g., light, due to medium inhomogeneity is ubiquitous in physics and considered detrimental for many applications. Wavefront shaping technology a powerful tool defeat scattering focus light through inhomogeneous media, which vital optical imaging, communication, therapy, etc. based on the matrix (SM) extremely useful handling dynamic processes linear regime. However, imple...

Journal: :Annales de l'Institut Henri Poincaré C, Analyse non linéaire 1986

1999
Y. Xiong Q. Zhang X. Sun W. Tan X. Xin W. Ji

The pump-probe response of the metal cluster MoCu3Se4(PPh3)3/CH2Cl2 solution is similar to that of CBS, which implies a nonlinear scattering origin of its nonlinearity. To testify how much the nonlinear scattering contributes to the optical limiting process, we employ a method by inserting a light collection lens in a standard OL experimental setup. Results from such an experiment show that non...

2008
Halina Abramczyk

4. Nonlinear phenomena 4.1. Second-order nonlinear phenomena 4.2. Third-order nonlinear phenomena 4.3. Stimulated Raman scattering 4.4. Stimulated Brillouin scattering 4.5. Four-wave mixing (FWM) 4.6. Self-phase modulation (SPM) 4.7. Cross phase modulation (XPM) 4.8. Theoretical description of GVD phenomenon and self-phase modulation 4.8.1. Nonlinear Schrödinger equation 4.8.2. Inclusion of the...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2005
T Wellens B Grémaud D Delande C Miniatura

We theoretically study the propagation of light in a disordered medium with nonlinear scatterers. We especially focus on interference effects between reversed multiple scattering paths, which lead to weak localization and coherent backscattering. We show that, in the presence of weakly nonlinear scattering, constructive interferences exist in general between three different scattering amplitude...

Journal: :The Journal of chemical physics 2013
Guang S He Wing-Cheung Law Alexander Baev Sha Liu Mark T Swihart Paras N Prasad

The nonlinear optical properties of four metallic (Au-, Au/Ag-, Ag-, and Pt-) nanoparticle suspensions in toluene have been studied in both femtosecond and nanosecond regimes. Nonlinear transmission measurements in the femtosecond laser regime revealed two-photon absorption (2PA) induced nonlinear attenuation, while in the nanosecond laser regime a stronger nonlinear attenuation is due to both ...

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