Мақола

Efficient luminescence from rhodamine 6G absorbed by porous alumina: Excitation mechanisms

A. MoadhenEquipe de Spectroscopie Raman, Département de Physique, Faculté des Sciences de Tunis, 2092 Elmanar Tunis, TunisiaHabib ElhouichetEquipe de Spectroscopie Raman, Département de Physique, Faculté des Sciences de Tunis, 2092 Elmanar Tunis, TunisiaL. NosovaHeat Physics Department, Academy of Sciences of Uzbekistan, 28 Katartal str., 700135 Tashkent, UzbekistanM. OueslatiEquipe de Spectroscopie Raman, Département de Physique, Faculté des Sciences de Tunis, 2092 Elmanar Tunis, Tunisia

Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physicsjournal2007en

ABI

Аннотация

Abstract Porous alumina (PA) samples are impregnated in rhodamine 6G (Rh6G) solution in order to form Rh6G/PA nanocomposites. The Fourier Transformer Infrared (FTIR) measurements show dispersion of dye molecules into the PA matrix. The investigations are focused on the photoluminescence (PL) properties and PL mechanisms in Rh6G/PA. We have discussed the effect of excitation beam wavelength on the PL spectrum of Rh6G/PA nanocomposite. It was found that the efficient luminescence of Rh6G/PA nanocomposite is governed by direct excitation and by dipolar interactions between Rh6G molecules with chemical species in alumina crystallites, as has been proved by FTIR measurements. An anti‐Stokes photoluminescence (APL) has been observed using a He‐Ne laser excitation. We show that its origin is related to a second order phenomenon where phonon absorption plays a key role. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Мавзулар

Anodic Oxide Films and Nanostructures Silicon Nanostructures and Photoluminescence Photonic Crystals and Applications

Идентификаторлар

DOI: 10.1002/pssc.200674413

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