We report on the preparation and optical characterization of three dimensional colloidal photonic crystal (PhC) containing an engineered planar defect embedding photoactive push-pull dyes. Free standing polystyrene films having thickness between 0.6 and 3 μm doped with different dipolar chromophores were prepared. These films were sandwiched between two artificial opals creating a PhC structure with planar defect. The system was characterized by reflectance at normal incidence angle (R), variable angle transmittance (T) and photoluminescence spectroscopy (PL) Evidence of defect states were observed in T and R spectra which allow the light to propagate for selected frequencies within the pseudogap (stop band).

Stasio, F., Cucini, M., Berti, L., Comoretto, D., Abbotto, A., Bellotto, L., et al. (2009). Tuning optical properties of opal photonic crystals by structural defects engineering. JOURNAL OF THE EUROPEAN OPTICAL SOCIETY. RAPID PUBLICATIONS, 4 [10.2971/jeos.2009.09033].

Tuning optical properties of opal photonic crystals by structural defects engineering

ABBOTTO, ALESSANDRO;MANFREDI, NORBERTO;
2009

Abstract

We report on the preparation and optical characterization of three dimensional colloidal photonic crystal (PhC) containing an engineered planar defect embedding photoactive push-pull dyes. Free standing polystyrene films having thickness between 0.6 and 3 μm doped with different dipolar chromophores were prepared. These films were sandwiched between two artificial opals creating a PhC structure with planar defect. The system was characterized by reflectance at normal incidence angle (R), variable angle transmittance (T) and photoluminescence spectroscopy (PL) Evidence of defect states were observed in T and R spectra which allow the light to propagate for selected frequencies within the pseudogap (stop band).
Articolo in rivista - Articolo scientifico
photonic crystals
English
Stasio, F., Cucini, M., Berti, L., Comoretto, D., Abbotto, A., Bellotto, L., et al. (2009). Tuning optical properties of opal photonic crystals by structural defects engineering. JOURNAL OF THE EUROPEAN OPTICAL SOCIETY. RAPID PUBLICATIONS, 4 [10.2971/jeos.2009.09033].
Stasio, F; Cucini, M; Berti, L; Comoretto, D; Abbotto, A; Bellotto, L; Manfredi, N; Marinzi, C
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/23801
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