Results 41 to 50 of about 1,229,730 (151)
, 1996 The nonlinear index of refraction in a resonant region has been determined by the use of a fiber-based Mach-Zehnder interferometer to measure the temporal fringe shift between two signals.
Glesk, I. +3 more
core +4 more sources
Negative irradiance-dependent nonlinear refraction in single-layer graphene
, 2018 We show that single-layer graphene presents negative irradiance-dependent nonlinear refraction. We discriminate between a low-irradiance regime, where the conventional Kerr effect applies and a high-irradiance regime where the nonlinear refraction ...
Biancalana, Fabio; id_orcid +11 more
core +1 more source
The nonlinear optical properties of coupling and decoupling graphene layers
AIP Advances, 2013 Third-order optical nonlinearities of graphene from monolayer to multilayers were investigated in the femtosecond regime, and the contribution of interlayer coupling to the nonlinearities was studied. The nonlinear refractive index γ of the order of 10−9
Wei Chen +9 more
doaj +1 more source
Nonlinear interaction of charged particles with strong laser pulses in a gaseous media
Physical Review Special Topics. Accelerators and Beams, 2007 The charged particles nonlinear dynamics in the field of a strong electromagnetic wave pulse of finite duration and certain form of the envelope, in the refractive medium with a constant and variable refraction indexes, is investigated by means of ...
H. K. Avetissian +2 more
doaj +1 more source
Al-Mustansiriyah Journal of Science, 2017 Z-scan technique was employed to study the nonlinear optical properties (nonlinear refractive index and nonlinear absorption coefficient) for crystal violet doped polystyrene films as a function of doping ratio in chloroform solvent.
Mahasin F. Hadi +2 more
doaj +1 more source
Ultrafast Dynamics of Optical Nonlinearities in β-Ga2O3
Frontiers in Materials, 2021 We report the different nonlinear optical mechanisms and defect-related carrier dynamics in Sn-doped β-Ga2O3 crystal by utilizing time-resolved pump-probe technique based on phase object under UV excitation.
Yingfei Sun +9 more
doaj +1 more source
Nondegenerate Nonlinear Refraction in Semiconductors
, 2014 The dispersion of nondegenerate nonlinear refraction in semiconductors is measured using our beam-deflection method. With high nondegeneracy, n2 is significantly enhanced over the degenerate case, and rapidly switches sign to negative near the ...
Reichert, Matthew +7 more
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Measuring Nonlinear Refraction and Its Dispersion
, 2009 We describe methods for measuring the nonlinear refraction of nominally transparent materials that involve propagation from the near to the far field, which changes a phase distortion into an amplitude redistribution.
Eric W. Van Stryland +3 more
core +2 more sources
Negative refraction in nonlinear wave systems
, 2007 Scientists have been familiar with the phenomenon of wave refraction for several centuries. Recently, a novel type of refraction, i.e., negative refraction, where both incident and refractory lines locate on the same side of the normal line, has been ...
Gang Hu, Zhoujian Cao, Hong Zhang
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Nonlinear refraction and absorption activity of dimethylaminostyryl substituted BODIPY dyes [PDF]
, 2016 International audienceOptical and nonlinear optical properties of difluoroboradiazaindacene (BODIPY) models with attached dimethylaminostyryl substituents were studied. The optical absorption and fluorescence emission of BODIPY compounds were found to be
Sahraoui, B. +13 more
core +1 more source