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In order to increase the efficiency of thin-film solar cells, the nanostructure of these cells has to be optimized. To this end, simulations of the optical wave in thin-film solar cells are required. The frequency dependence of the refraction index of materials, like amorphous silicon (a-Si:H), cannot be described by dispersive models like Drude model. Therefore, single frequency simulations for the...
This contribution deals with the description of the Italian Radio Occultation experiment on board the Indian OCEANSAT-2 Mission. Details of the Italian Radio Occultation Ground Segment and results obtained within the validation activity will be discussed. Atmospheric profiles (in terms of refractivity, temperature, and electron density) obtained processing ROSA raw observations will be presented.
In a recent work we found equivalence between the Time Reversal techniques and the use of Meta-materials in order to achieve the overcoming of the diffraction limit. Now we present the vector generalization of a formalism developed in a former study of Discrete Acoustic Time Reversal. The ulterior purpose is to apply it to electromagnetic waves, not only as an alternative to the use of left-hand materials...
The geometry analyzed in this paper consists of a metallic prolate spheroid coated with confocal spheroidal layers of lossless materials whose refractive indexes are either equal (isorefractive) or opposite in sign (anti-isorefractive) to the refractive index of the medium surrounding the structure. The primary source is an electric dipole located on the axis of symmetry and axially oriented. The...
Evaporative and advective processes can significantly affect the refractive index structure in littoral environments. This paper discusses the validity of existing models in accurately describing refractive index profiles in both a tropical littoral environment and also a temperate environment. The results show that in some instances the refractivity models agree quite well with measurements. In other...
Whispering gallery modes of a flat dielectric disk are studied by means of analytical and numerical computational methods based on the finite integration technique. The results are compared to a high accuracy measurement. The frequently used semi-analytical method of effective refractive index has certain weaknesses in finding accurate eigenfrequencies and quality factors.
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