منابع مشابه
Light guiding light: Nonlinear refraction in rubidium vapor
Recently there has been experimental and theoretical interest in cross-dispersion effects in rubidium vapor, which allows one beam of light to be guided by another. We present theoretical results which account for the complications created by the D line hyperfine structure of rubidium as well as the presence of the two major isotopes of rubidium. This allows the complex frequency dependence of ...
متن کاملFocusing light using negative refraction
A slab of negatively refracting material, thickness d , can focus an image at a distance 2d from the object. The negative slab cancels an equal thickness of positive space. This result is a special case of a much wider class of focusing: any medium can be optically cancelled by an equal thickness of material constructed to be an inverted mirror image of the medium, with ε, μ reversed in sign. W...
متن کاملDispersion of nonlinear refraction and two-photon absorption using a white-light continuum Z-scan.
We use a white-light continuum (WLC) Z-scan technique to measure the degenerate two-photon absorption spectrum and associated dispersion of the nonlinear refraction in ZnSe. The spectral components of the WLC source are separated by using a narrow band variable filter to minimize nondegenerate nonlinearities. We observe a change in sign of the ultrafast nonlinear refractive index around 0.7 of ...
متن کاملNonlinear refraction dynamics of solvents and gases
We present measurements of the temporal and polarization dependence of the nonlinear optical (NLO) response of selected organic solvents using our beam deflection (BD) method. These measurements allow us to separately determine the boundelectronic and nuclear responses which then determines the NLO response function. With this NLO response function the outcome of other experiments such as Z-sca...
متن کاملNegative refraction of light by vacuum
Propagation of electromagnetic plane waves in some directions in gravitationally affected vacuum over limited ranges of spacetime can be such that the phase velocity vector casts a negative projection on the time–averaged Poynting vector. This conclusion suggests, inter alia, gravitationally assisted negative refraction by vacuum.
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ژورنال
عنوان ژورنال: Journal of Mathematical Study
سال: 2021
ISSN: 1006-6837,2617-8702
DOI: 10.4208/jms.v54n2.21.02