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Effect of Fano Resonance in photovoltaic

100%
Sun D.
Coherent Phenomena
|
2014
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vol. 2
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issue 1
EN
We have shown that the Fano interference in the decay channels of a three-level system can lead to considerably different absorption and emission profiles. We found that a coherence can be built up in the ground state doublet, with strength depending on a coupling parameter that arises from the Fano interference. The coherence can in principle lead to breaking of the detail balance between the absorption and emission processes in atomic systems.
2
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Prediction of optical properties of paints

100%
Ďurikovič R., Ágošton T.
Open Physics
|
2007
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vol. 5
|
issue 3
416-427
EN
The field of predictive rendering concerns itself with those methods of image synthesis which yield results that do not only look real, but are also radiometrically correct renditions of nature, i.e., which are accurate predictions of what a real scene would look like under given lighting conditions. A real coating consists of pigments, effect pigments, clear lacquer and glaze. A novel and unique combination of real parameters that are commonly measured in the industry and a theoretical reflectance model consisting of measurable parameters is required. Here, the authors design perception parameters and put them into well known surface reflection functions such as He and Torrance. The original contributions are the study of the sub-surface scattering of real paint and the prediction of its appearance in rendered images by the proposed model of light reflection beneath the paint surface.
3
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Comparison of Methods for Determining the Contrast Distribution in Interference Images with Speckle Noise

84%
Pyziak L., Matczak M., Zięba P.
Acta Physica Polonica A
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2017
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vol. 132
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issue 1
173-175
EN
Information about certain physical states of an examined object is encoded in the distribution of the fringe contrast in the metrological interference images of the object. Determining the contrast is one of the steps of converting the image into the distribution of the measured quantity in holographic fringe-contrast interferometry. In this paper, three methods of determining the fringe contrast in interference images containing speckle noise are compared. As the criterion for comparing the methods, the mean absolute error has been used. It turns out, in accordance with this criterium, the most effective method is the phase-shifting one.
4
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On the modulation frequency dependence of the photoacoustic signal for a metal coated glass-liquid system

84%
Marín E., Vera-Medina G., García A., Calderón A.
Open Physics
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2010
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vol. 8
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issue 4
634-638
EN
We show that the front photoacoustic signal due to a sample consisting of a glass plate with a metal coated surface, at which thermal waves are generated by periodical light absorption, enhances for certain modulation frequencies when the other glass surface is covered with a liquid sample. This contradicts the intuitive expectation based on the assumption that the liquid provides a new channel for heat conduction thereby decreasing the substrate temperature. Experimental results are shown and the described effect is explained using a thermal wave interference model.
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