Temat: 41.20.Jb - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Optimization of Directional Antennas in Two-Dimensional Artificial Dielectrics
Autorzy:: Janowicz, M.
Rusek, M.
Orłowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/2037143.pdf
Data publikacji:: 2004-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 41.20.Jb
84.40.Ba
42.25.Bs
Opis:: We investigate numerically the problem of optimization of directional characteristics of dipole antennas located inside, or in the vicinity of, photonic crystals or more general artificial dielectrics, made of very thin perfectly conducting wires. We concentrate on two-dimensional propagation. Simulated annealing is used to find the distribution of wires which optimizes the directional pattern. It is demonstrated that high directivity can be obtained for systems containing a very small number of elements provided that the size and shape of the unit cell as well as the position of the radiating source with respect to the crystal are optimized. Building up of the radiation pattern is also illustrated with the help of the wave-optical rays.
Źródło:: Acta Physica Polonica A; 2004, 105, 3; 263-278
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

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

Skocz do pozycji: 3.

Tytuł:: Scattering of Light by Photonic Crystals
Autorzy:: Hoenders, B. J.
Doosje, M.
Knoester, J.
Powiązania:: https://bibliotekanauki.pl/articles/2030312.pdf
Data publikacji:: 2002-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.70.Qs
42.25.Fx
42.25.Bs
03.50.De
41.20.Jb
Opis:: A new method is developed to calculate the scattering of light at the surface of a photonic crystal. The problem is solved in terms of virtual surface-current distributions and the calculation takes full advantage of the infinite-space plane-wave expansion method for obtaining the photonic band structure. Working with surface currents makes the calculations less time-consuming by means of reduction of the dimensionality in the problem. The method is applied to a semi-infinite dielectric continuum and for semi-infinite two-dimensional photonic crystals of small and large dielectric contrast.
Źródło:: Acta Physica Polonica A; 2002, 101, 1; 133-146
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Optical Properties of the (3,12,12) Hexagonal Archimedean Photonic Crystal
Autorzy:: Jovanović, Ð.
Gajić, R.
Hingerl, K.
Powiązania:: https://bibliotekanauki.pl/articles/1795628.pdf
Data publikacji:: 2009-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.70.Qs
61.50.Ah
41.20.Jb
42.25.Bs
42.25.Gy
Opis:: We present a theoretical research of the optical properties of the (3,12,12) hexagonal 2D Archimedean photonic crystals. The structures are made of GaAs dielectric rods in air. Our research is mainly focused on analyzing symmetry properties of the modes and the appearance of the uncoupled modes which strongly affects the propagation of the wave and the optical performances of the material.
Źródło:: Acta Physica Polonica A; 2009, 116, 4; 642-644
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Electromagnetic Waves Absorption by Graphene-Magnetic Semiconductor Multilayered Nanostructure in External Magnetic Field: Voight Geometry
Autorzy:: Kuzmin, D.
Bychkov, I.
Shavrov, V.
Powiązania:: https://bibliotekanauki.pl/articles/1386985.pdf
Data publikacji:: 2015-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 41.20.Jb
42.25.Bs
68.65.Ac
68.65.Cd
68.65.Pq
Opis:: Absorption of electromagnetic waves by graphene-magnetic semiconductor multilayered structure has been investigated for the Voight geometry with taking into account the dissipation processes. The possibility of control of electrodynamic properties of the structure by an external magnetic field, changing in number of periods of the structure, chemical potential of the graphene layers and temperature has been shown. Electrodynamics of the structure is also sensitive to polarization of the incident wave. The structure shows to be especially controllable at terahertz frequencies.
Źródło:: Acta Physica Polonica A; 2015, 127, 2; 528-530
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja