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Proceedings Paper

Characterization of the guided light/photonic crystal coupling by absorbance
Author(s): Lucie Devys; Géraldine Dantelle; Viacheslav Kubytskyi; Henri Benisty; Thierry Gacoin
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Paper Abstract

Considering luminescent TiO2 films whose surface was imprinted with a 2D square shaped photonic crystal with different pattern depths (from 20 to 61 nm), we demonstrate the possibility to use simple absorption measurements to evaluate the efficiency of light extraction. Absorption spectra of the patterned systems show absorption peaks, evidencing the coupling between the photonic crystal structure and light guided within the film, in good agreement with 2D-RCWA simulations. The deeper the pattern depth, the stronger the coupling between the guided light and the photonic crystal. Using RCWA simulations, we show that it is possible to evaluate the extraction length, characteristic of the efficiency of light extraction, from the absorption spectra, in good agreement with direct measurements reported elsewhere.

Paper Details

Date Published: 19 September 2013
PDF: 8 pages
Proc. SPIE 8818, Nanostructured Thin Films VI, 88180N (19 September 2013); doi: 10.1117/12.2024063
Show Author Affiliations
Lucie Devys, Lab. de Physique de la Matière Condensée, CNRS, Ecole Polytechnique (France)
Géraldine Dantelle, Lab. de Physique de la Matière Condensée, CNRS, Ecole Polytechnique (France)
Viacheslav Kubytskyi, Lab. de Physique de la Matière Condensée, CNRS, Ecole Polytechnique (France)
Henri Benisty, Institut d'Optique Graduate School, CNRS, Univ. Paris-Sud (France)
Thierry Gacoin, Lab. de Physique de la Matière Condensée, CNRS, Ecole Polytechnique (France)


Published in SPIE Proceedings Vol. 8818:
Nanostructured Thin Films VI
Tom G. Mackay; Akhlesh Lakhtakia; Yi-Jun Jen; Motofumi Suzuki, Editor(s)

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