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


Wyświetlanie 1-4 z 4
Tytuł:
Engineering and Advanced Digitalization of Photonic Structures with Bound Field in the Continuum
Autorzy:
Prodanović, N.
Milanović, V.
Radovanović, J.
Powiązania:
https://bibliotekanauki.pl/articles/1795614.pdf
Data publikacji:
2009-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
11.30.Pb
03.65.Ge
42.25.Bs
Opis:
We describe a method for generation of complex optical potentials which support a bound state of the electric field in continuous part of the spectrum. It is based on deep analogy between quantum mechanical and electromagnetic phenomena and relies on the application of supersymmetric quantum mechanics to generate a smoothly varying complex optical potential, together with the corresponding electric field function for the (single) localized state. However, the obtained potential profile is generally a strongly oscillating function which requires additional processing to make it suitable for practical realization. With this goal in mind, i.e. the construction of a realizable photonic crystal with complex permittivity which supports one bound state in continuum, we have developed an original scheme of digital grading. It approximates the values of the complex relative permittivity in such manner that the final structure may be realized by assembling layers of homogeneous materials.
Źródło:
Acta Physica Polonica A; 2009, 116, 4; 607-610
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Goos-Hänchen Shift on Tunneling Times in Dispersive Nonlinear Media
Autorzy:
Ilić, I.
Beličev, P.
Milanović, V.
Radovanović, J.
Hadžievski, Lj.
Powiązania:
https://bibliotekanauki.pl/articles/1795625.pdf
Data publikacji:
2009-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Xp
42.25.Bs
42.65.Hw
78.20.Ci
Opis:
The Goos-Hänchen effect is an optical phenomenon defined as a displacement of the reflected beam of linearly polarized light after the total internal reflection, which occurs perpendicularly to the direction of propagation. Due to this effect, when an optical wave propagates through a barrier, tunneling times may change accordingly. In this paper, we consider the impact of the Goos-Hänchen effect on group delay and dwell time for electromagnetic wave propagating through a nonlinear dispersive slab placed inside linear dispersive surroundings. Numerical calculations are performed for the special case, namely a double negative index metamaterial embedded into a material with a saturable nonlinearity, when a background medium is vacuum. The numerical results for tunneling times are calculated when the Goos-Hänchen effect is observed. It is shown that this approach gives more accurate expressions for tunneling times when the angle of incidence has a non-zero value.
Źródło:
Acta Physica Polonica A; 2009, 116, 4; 638-641
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time Delay in Thin Slabs with Kerr-Type Nonlinearity
Autorzy:
Radovanović, J.
Milanović, V.
Isić, G.
Ikonić, Z.
Indjin, D.
Powiązania:
https://bibliotekanauki.pl/articles/2047864.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.25.Bs
42.65.Hw
42.6.Tg
03.65.Xp
Opis:
In this paper we analyzed the following model: a thin slab with Kerr nonlinearity placed between two semi-infinite samples of linear and nonmagnetic materials. A general relation between the bidirectional group delay and the dwell time is derived for the thin slab. It is shown that the group delay is equal to the dwell time plus a self-interference delay. Particular attention is given to solving the Helmholtz equation for this case. Detailed and rigorous treatment revealed that the solutions of the Helmholtz equation are given via elliptic functions of the first kind. The boundary conditions at the interfaces are determined precisely. Finally, we provide an overall procedure for numerical calculation of the dwell times.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 987-992
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time Delay in Thin Dielectric Slabs with Saturable Nonlinearity
Autorzy:
Beličev, P.
Ilić, I.
Radovanović, J.
Milanović, V.
Hadžievski, Lj.
Powiązania:
https://bibliotekanauki.pl/articles/1808066.pdf
Data publikacji:
2009-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Xp
41.20.Jb
42.25.Bs
42.70.Nq
Opis:
Time delays for an intense transverse electric wave propagating through a slab with saturable nonlinearity are investigated. The nonlinearity is assumed in a form of the Vinetskii-Kukhtarev model, which is relevant for the slabs made of nonlinear photorefractive crystals, such as GaAs and $LiNbO_3$, which feature a saturable nonlinearity. The expressions for the group delay and the dwell time are derived and the relation between them is studied. It is shown that the difference between them has three different contributions. The first one corresponds to the self-interference associated with the dispersion of the medium surrounding the slab. The other two appear due to the nonlinearity of the slab and oblique incidence of the transverse electric wave. All the results are compared with the case of dielectric slabs with cubic (Kerr) nonlinearity.
Źródło:
Acta Physica Polonica A; 2009, 115, 4; 834-837
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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