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Synthesis of organic-inorganic composite films with photonic crystal properties

Pavel E. Khokhlov 1Alexander Sinitskii 1Sergey O. Klimonsky 2Tatyana V. Laptinskaya 3Ming Li 4Juntao Li 4Jianying Zhou 4Yuri D. Tretyakov 1,2

1. Faculty of Materials Science, Moscow State University, Lenin Hills, Moscow 119992, Russian Federation
2. Chemistry Department, Moscow State University, Leninskie Gory, 1-3, Moscow 119992, Russian Federation
3. Physics Department, Moscow State University, Lenin Hills, Moscow 119992, Russian Federation
4. State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yet-Sen University, Guangzhou 510275, China

Abstract

Recently, films with three-dimensionally ordered meso- and nanoporous structures have been extensively studied due to their wide applications in catalysis, separations and optics. These materials can be made by using self-assembling systems (e.g. surfactants, biological systems and so on). A relatively new field that benefits from porous materials is the field of photonic crystals (PCs) - dielectric composites with a highly periodic structure in which the dielectric constant varies on the scale of visible light wavelength. PCs were predicted to exhibit a photonic bandgap (PBG), for which light within a certain frequency range cannot propagate in any direction inside the crystals, causing the unique properties of PCs, such as localization of light and control of spontaneous emission. The last effect is of great importance for fabrication of low-threshold lasers and can be observed in PCs with luminescent centres.

The aim of the present work was to synthesize PC films infiltrated with organic complexes of Eu3+ and Tb3+. Three types of PCs were used as hosts for luminescent centers: ordered films of polystyrene microspheres and inverse PCs based on silica and titania. In each case the position of PBG was accurately fitted to the wavelengths of visible lines of Eu3+ or Tb3+ photoluminescence by proper choice of PC lattice period. High spatial anisotropy of photoluminescence was observed by spatially- and spectrally-resolved laser spectroscopic measurement.

The work was supported by the Russian Foundation for Basic Research (grants nos. 05-03-32778 and 04-03-39010) and the Program for Fundamental Research of Russian Academy of Sciences.
 

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Related papers

Presentation: Oral at E-MRS Fall Meeting 2006, Symposium A, by Pavel E. Khokhlov
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-20 16:14
Revised:   2009-06-07 00:44