Autor: Al-Awfi, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Theory of evanescent Bessel beams with a metallic sheet
Autorzy:: Al-Awfi, S.
Powiązania:: https://bibliotekanauki.pl/articles/173463.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: optical vortex
optical lattice
metallic sheet
surface modes
Opis:: We explain how a surface optical vortex can be created when a Bessel beam is totally reflected internally at the planar surface of a dielectric on which a metallic sheet has been deposited. A two-dimensional patterning on the surface, the strongly localized intensity distribution decays with distance vertical to the surface. The characteristics of this surface optical vortex depend on the incident beam parameters and the dielectric mismatch of the media.
Źródło:: Optica Applicata; 2013, 43, 3; 539-550
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Transient Dynamics of Atoms Inside Submicron Rectangular Waveguides
Autorzy:: Al-Awfi, S.
Powiązania:: https://bibliotekanauki.pl/articles/1400116.pdf
Data publikacji:: 2013-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 03.75.Be
37.30.+i
Opis:: The time evolution of the radiation pressure forces due to the action of a laser light on two-level atom moving inside a long hollow cylinder with a rectangular cross-section of sub-wavelength dimensions a × b is presented. This evolution is considered when the frequency of the light is comparable to a dipole allowed transition frequency. In this limit, the decay emission Γp is possible only via a very small number of modes. From the solutions of the Bloch equations in the dynamic regime, we find that the transient regime, applicable from the instant the laser is switched on. This is important for the gross motion, provided that the upper-state lifetime $\Gamma p^{-1}$ is relatively long while the steady-state regime, formally such that t ≫ $Γp^{-1}$, is appropriate for the evaluation of the forces and the dynamics for large Γp. Significant variations of the characteristics of the system are emphasized. These features are illustrated using typical parameters for the case of $Eu^{3+}$ that has a particularly small Γp.
Źródło:: Acta Physica Polonica A; 2013, 123, 4; 631-636
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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