Temat: negative index metamaterial - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Projecting procedure for metamaterial cylindrical waveguide
Autorzy:: Reichel, B.
Kuszner, M.
Powiązania:: https://bibliotekanauki.pl/articles/1940703.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Gdańska
Tematy:: negative index metamaterial
nonlinearity
NLSE
Opis:: In this paper a new way of derivation of an evolution equation for short pulses in a dielectric waveguide including one model of a metamaterial waveguide is shown. This derivation model relies upon projecting to an orthogonal basis. In our case such orthogonal basis for cylindrical waveguides is chosen as Bessel functions.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2017, 21, 2; 165-172
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Narrow transmission mode in one-dimensional symmetric defective photonic crystal containing metamaterial and high Tc superconductor
Autorzy:: Srivastava, Sanjeev K.
Aghajamali, Alireza
Powiązania:: https://bibliotekanauki.pl/articles/173630.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: photonic crystal
photonic band gap
transmission spectra
transmission mode
defect mode
metamaterial
negative index material
superconductor photonic crystal
Opis:: We theoretically investigate the properties of narrow transmission mode (defect mode) within the reflection band in one-dimensional symmetric defective photonic crystal containing double negative metamaterial and high temperature superconductors. The transmittance spectrum of the proposed structure is obtained by using the characteristic or transfer matrix method. The results show that by increasing the thickness of air defect, transmission mode shifts towards the lower frequency side. But when the thickness of a superconductor layer is increased, transmission mode shifts towards the high frequency side. Further, the effect of temperature variation of superconducting defect on the defect mode has been investigated and found that when the temperature of superconducting layer increases the frequency of defect mode is red shifted. The shift in frequency has smaller value in the lower temperature region than in the higher temperature region, even if the change in temperature is same. Finally we have discussed the effect of variation of thickness on the defect mode by using the double negative metamaterial as defect layer in place of superconductor layer. The result shows that we get two modes for smaller thickness of double negative layer but only a single mode for larger thickness.
Źródło:: Optica Applicata; 2019, 49, 1; 37-50
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: On the new types of composite metamaterials
Nowy typ kompozytowych metamateriałów
Autorzy:: Tralle, Igor
Zięba, Paweł
Powiązania:: https://bibliotekanauki.pl/articles/129556.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:: negative refraction index
three-component gyromagnetic metamaterials
single-domain ferro-magnetic nanoparticles
superparamagnetism
Bruggeman approximation
ujemny współczynnik załamania
trójskładnikowy metamateriał giromagnetyczny
jednodomenowe ferromagnetyczne nanocząstki
superparamagnetyzm
przybliżenie Bruggemana
Opis:: This paper is the review of our study published in J Appl Phys 115, 233509 (2014) and J Mater Sci 53, 2034 (2018). In it, we examined the possibility of fabricating the metamaterial, which is both gyrotropic and of the simultaneously negative permittivity and permeability. Our idea was to use the three-component mixture of ingredients, where one of them is responsible for the negative effective permeability µeff of hypothetical metamaterial, while all three are responsible for the negative value of effective permittivity εeff. At first we considered the following composite: the first component was the “swarm” of single-domain ferromagnetic nanoparticles, immersed in a mixture of other two, silver and mercury cadmium telluride. Then, as fabrication of the Hg1-x Cdx Te is related to using mercury which is very poisoning, we tried to exclude this material substituting it by Pb1-x Snx Te. Additionally, taking into account that silver is relatively expensive material, we have also used Cu and Al particles as the cheaper substitute of it. We have shown by computer simulations that by the proper fitting of the parameters, e.g., the radius of nanoparticles, their magnetic moments, the relative concentration of ingredients, etc., it is possible to obtain the double-negative metamaterial, that is with negative refraction index in a relatively broad range of temperatures and magnetic fields. The last seems to be very promising in terms of practical applications of metamaterials.
Praca stanowi przegląd prac autorów, opublikowanych wcześniej (J Appl Phys 115, 233509 (2014) oraz J Mater Sci 53, 2034 (2018)). W w/w pracach autorzy zbadali możliwość utworzenia metamateriału, który byłby jednocześnie giroskopowy oraz posiadał ujemne części rzeczywiste przenikalności magnetycznej i dielektrycznej. Ideą jest wykorzystanie w tym celu mieszanki trzech składników, z których pierwszy - to "rój" ferromagnetycznych nanocząstek.
Źródło:: Physics for Economy; 2019, 3, 1; 53-65
2544-7742
2544-7750
Pojawia się w:: Physics for Economy
Dostawca treści:: Biblioteka Nauki

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