Article
Phase delay and group velocity determination at a planar defect state in three dimensional photonic crystals
Author/s | Galisteo López, J. F.
Galli, M. Andreani, Lucio C. Mihi Cervello, Agustín Pozas Bravo, Raúl Ocaña Jurado, Manuel Míguez García, Hernán Ruy |
Department | Universidad de Sevilla. Departamento de Química Inorgánica |
Publication Date | 2007 |
Deposit Date | 2019-02-22 |
Published in |
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Abstract | Phase sensitive optical transmission measurements have been performed on three dimensional opal-based photonic crystals containing a planar defect. From numerical derivation of the measured phase, the group velocity has ... Phase sensitive optical transmission measurements have been performed on three dimensional opal-based photonic crystals containing a planar defect. From numerical derivation of the measured phase, the group velocity has been retrieved. Strong modulations in the group velocity are seen to correlate with a recovery in the transmission inside the forbidden spectral interval, demonstrating the presence of a localized defect state. Accordingly, the phase change measured across the forbidden interval doubles in the lattice containing a planar defect with respect to the defect-free crystal, as expected when introducing a localized state inside the pseudogap. All results have been modeled with a scalar wave approximation in a two band model including extinction. |
Funding agencies | Ministerio de Educación y Ciencia (MEC). España |
Project ID. | MAT2005-03028 |
Citation | Galisteo López, J.F., Galli, M., Andreani, L.C., Mihi Cervello, A., Pozas Bravo, R., Ocaña Jurado, M. y Míguez García, H.R. (2007). Phase delay and group velocity determination at a planar defect state in three dimensional photonic crystals. Applied Physics Letters, 90 (10), 101113-. |
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