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Wyszukujesz frazę "Matović, J." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Fishnet-Based Metamaterials: Spectral Tuning Through Adsorption Mechanism
Autorzy:
Jakšić, Z.
Tanasković, D.
Matovic, J.
Powiązania:
https://bibliotekanauki.pl/articles/1795620.pdf
Data publikacji:
2009-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Xj
78.67.Pt
42.25.Bs
73.20.Mf
81.07.-b
Opis:
In this work we consider the tuning of spectral reflectance of fishnet metamaterials with circular or elliptic apertures due to the presence of dielectric analyte adsorbed within the pores of the dielectric part. We simulated the electromagnetic response of the fishnet metamaterials for the optical range utilizing the finite element method. Our investigation is dedicated to ultrathin, freestanding laminated structures (metal-dielectric-metal self-supported nanomembrane sandwiches with nanometric thickness). We also investigated some issues connected with experimental fabrication of the freestanding fishnets for adsorbtion-based sensors.
Źródło:
Acta Physica Polonica A; 2009, 116, 4; 625-627
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vacuum Fluctuations in Optical Metamaterials Containing Nonlinear Dielectrics
Autorzy:
Jakšić, Z.
Ostojić, S.
Tanasković, D.
Matović, J.
Powiązania:
https://bibliotekanauki.pl/articles/1795621.pdf
Data publikacji:
2009-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.Mf
81.05.Xj
42.50.Lc
78.67.-n
78.67.Pt
Opis:
We investigated the influence of zero-point fluctuations (vacuum fluctuations, optical quantum noise) to the optical response of electromagnetic metamaterials containing dielectrics with third-order Kerr-like nonlinearity. We determined the zero-point noise and calculated it for different analytes, including those used in forensic analysis and organic pollutants. The zero-point noise level is highest for shortest-wavelength plasmons and decreases towards long-range plasmons. It may be tailored through a convenient design of the metamaterial structure. Since noise spectral power is proportional to the nonlinearity of the analyte species present, we considered the possibility to use zero-point noise as an auxiliary tool for identification of targeted nonlinear samples. We believe that our investigation could be of importance in homeland defence, forensics, biomedicine, etc.
Źródło:
Acta Physica Polonica A; 2009, 116, 4; 628-630
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Boron Doping Concentration on $MgH_{2}$ Electronic Structure
Autorzy:
Kurko, S.
Paskaš-Mamula, B.
Matović, Lj.
Grbović Novaković, J.
Novaković, N.
Powiązania:
https://bibliotekanauki.pl/articles/1503283.pdf
Data publikacji:
2011-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.15.A-
88.80.F-
88.30.R-
Opis:
We have performed ab initio electronic structure calculations of $Mg_{1-x}B_{x}H_{2}$ compounds with different boron concentrations, ranging from x =0.0625 to 0.5. Full structural relaxation was performed in order to properly describe influence of dopant on host matrix. Results showed that there is a strong influence of boron concentration on structural and thermodynamic stability of compound. B-H bond length is substantially shorter then in Mg-H coordination polyhedron. Boron significantly contributes to density of states at Fermi level within energy gap. The width of boron electronic states heavily depends on boron concentration, causing reduction of energy gap of host $MgH_{2}$, and leading to metallic nature of compound with highest boron concentration. The predicted thermodynamic instability of compounds with higher boron concentration is in agreement with experimental findings that under similar stoichiometry, boron with magnesium forms only complex hydride, $Mg(BH_{4})_{2}$. It is also shown that existence of stable hydrides with $MgH_{2}$ rutile structure and small concentration of boron is possible in principle and that boron can be used to further destabilize $MgH_{2}$ in order to enhance its hydrogen sorption-desorption kinetics.
Źródło:
Acta Physica Polonica A; 2011, 120, 2; 238-241
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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