Artículo
Interplay between crystal-size and disorder effects in the high-energy optical response of photonic crystal slabs
Autor/es | Dorado, Luis A.
Depine, Ricardo A. Lozano Barbero, Gabriel Sebastián Míguez García, Hernán Ruy |
Fecha de publicación | 2007 |
Fecha de depósito | 2019-01-03 |
Publicado en |
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Resumen | Experimental reflectance spectra have been obtained for colloidal crystals whose widths ranged from one to several sphere monolayers, and their features in the higher order band energy range have been reproduced theoretically. ... Experimental reflectance spectra have been obtained for colloidal crystals whose widths ranged from one to several sphere monolayers, and their features in the higher order band energy range have been reproduced theoretically. In order to fit the measured data, optical extinction has been introduced in the theoretical model, which accounts for structure imperfections and disorder, the main sources of losses in an actual measurement. A complex spectrum in the high frequency region is observed even for one ordered monolayer, being this peak structure gradually modified as more layers are piled up. This allowed us to identify which peaks are reminiscent of the optical reflectance features of a single close-packed layer and which are the result of building up a three dimensional periodicity. A clear correlation between the amount of extinction introduced in the fitting and the slab width has been found, which demonstrates that wider real crystals produce less diffusely scattered light. At the same time, we find that the optical response of thinner crystals is more robust against the introduction of extinction than that of thicker ones, for which the effect is dramatic. |
Identificador del proyecto | 2005AR0070
ANPCYT-BID 802 OC-AR03-14099 MAT2005-03028 |
Cita | Dorado, L.A., Depine, R.A., Lozano Barbero, G.S. y Míguez García, H.R. (2007). Interplay between crystal-size and disorder effects in the high-energy optical response of photonic crystal slabs. Physical Review B - Condensed Matter and Materials Physics, 76, 245103-. |
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