Título:
|
Gain/loss periodic spatial modulated materials on a wavelength scale
|
Autor/a:
|
Staliunas, Kestutis; Herrero Simon, Ramon; Vilaseca Alavedra, Ramon
|
Otros autores:
|
Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear; Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
Abstract:
|
We predict self-collimation and superdiffusion of light propagating in materials with periodically modulated
gain/loss profile. The modulation is parallel and transverse to the light propagation direction and its periodicity is
on the wavelength scale. The self-collimation (or diffraction-free propagation) of the beams is found, which is
similar to that observed in photonic crystals. The superdiffusion is also predicted, which means a dependence of
the beam amplification on the propagation direction, which results in the spatial frequency filtering of the beams.
We justify the predictions by the numerical simulations of the paraxial wave propagation equations. |
Abstract:
|
Peer Reviewed |
Materia(s):
|
-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica -Photonic crystals -Llum -- Propagació |
Derechos:
|
|
Tipo de documento:
|
Artículo - Versión publicada Objeto de conferencia |
Editor:
|
IEEE Press. Institute of Electrical and Electronics Engineers
|
Compartir:
|
|