Mirror effect at the Brewster?s angle in semiconductor rectangular gratings (Articolo in rivista)

Type
Label
  • Mirror effect at the Brewster?s angle in semiconductor rectangular gratings (Articolo in rivista) (literal)
Anno
  • 2001-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.64.235319 (literal)
Alternative label
  • L.Pilozzi, H. Fenniche, A. D?Andrea (2001)
    Mirror effect at the Brewster?s angle in semiconductor rectangular gratings
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • L.Pilozzi, H. Fenniche, A. D?Andrea (literal)
Pagina inizio
  • 235319 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • The work has been part of a collaboration with the theoretical group headed by Prof. R. Bennaceur of the Science department of the Tunis university, Impact Factor=3.07 (literal)
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  • http://journals.aps.org/prb/abstract/10.1103/PhysRevB.64.235319 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 64 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 23 (literal)
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  • The improvement in nanotechnology has allowed to obtain semiconductor nano-gratings where the periodicity is of the order of the light wavelength in the visible range of energy and wires can support lateral dimension as large as the Wannier exciton Bohr radius. Due to the e-h quantum confinement and photon localization, these systems show new physical properties interesting for optoelectronic applications. In the present work, within the Green function formalism, we develop a self-consistent semi-classical framework in effective mass approximation to compute the linear optical response and the dispersion curves of a general 1D grating of semiconductor quantum wires. We also underline the easy generalization of the framework to 2D and 3D and the implementation for non-linear optics. For a dielectric grating a large stop band, with reflectivity greater than 95%, is observed for P polarization at the Brewster angle for high dielectric contrast and grating thickness one wavelength. This property, not yet observed experimentally, scales with the wire lateral dimension and the grating periodicity and can be moved from infrared to ultraviolet and be as large as all the visible spectrum. To explain this property, it is underlined that, at variance of normal mirror effect based on the interplay of travelling and dumped waves, the present result is based on the light resonant phenomenon of the structure (Wood’s anomalies) and also guided waves in the grating take a crucial role. (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 CNR 2 Facoltà di Scienze di Tunisi 3 CNR (literal)
Titolo
  • Mirror effect at the Brewster?s angle in semiconductor rectangular gratings (literal)
Abstract
  • The Green's functions of microstructured rectangular gratings, and the electric field for a non-local susceptibility are given in explicit form. A very broad energy band with reflectivity almost one is shown by model calculation for a strongly diffractive grating when the angle of incidence of the light is very close to the Brewster’s angle of the equivalent slab, and the grating thickness is about one light wavelength. The physical origin of this interesting effect is completely explained for the first time as an interplay between grating resonances and surface waves. In the energy range from infrared to ultraviolet, the ratio between band width DE and band edge energy Eo scales as DE/Eo=Lx/d, where Lx is the lateral dimension, and d is the periodicity of the grating. The easy tailoring of this effect should be promising for optoelectronic and photonic large band device applications. (literal)
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