Special Section on Nanostructured Thin Films: Latest Developments in Theory and Practice

Characterization of photonic crystal coupling to and from guided light by absorbance

[+] Author Affiliations
Lucie Devys

Laboratoire de Physique de la Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 PALAISEAU Cedex, France

Géraldine Dantelle

Laboratoire de Physique de la Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 PALAISEAU Cedex, France

Viacheslav Kubytskyi

Laboratoire de Physique de la Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 PALAISEAU Cedex, France

Henri Benisty

Laboratoire Charles Fabry de l’Institut d’Optique, CNRS, Université Paris-Sud, Campus Polytechnique, RD 128, F-91127 Palaiseau Cedex, France

Thierry Gacoin

Laboratoire de Physique de la Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 PALAISEAU Cedex, France

J. Nanophoton. 8(1), 083992 (Apr 03, 2014). doi:10.1117/1.JNP.8.083992
History: Received November 7, 2013; Revised March 5, 2014; Accepted March 5, 2014
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Abstract.  We considered luminescent TiO2 films whose surface was imprinted with a two-dimensional (2-D) square shaped photonic crystal with different pattern depths (from 20 to 61 nm). The aim of this work is to develop a straightforward method to characterize the PhC efficiency on light extraction. Transmission spectra of the patterned areas as obtained using a routine spectrometer exhibit peaks evidencing the coupling by the photonic crystal structure of free-space light with guided modes within the film, in good agreement with 2-D rigorous-coupled wave analysis (RCWA) simulations. As expected, the deeper the pattern depth, the stronger the coupling between the guided light and the photonic crystal. RCWA simulations allow evaluating quantitatively the extraction length, characteristic of the efficiency of light extraction, from the transmission spectra, in good agreement with direct measurements.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Lucie Devys ; Géraldine Dantelle ; Viacheslav Kubytskyi ; Henri Benisty and Thierry Gacoin
"Characterization of photonic crystal coupling to and from guided light by absorbance", J. Nanophoton. 8(1), 083992 (Apr 03, 2014). ; http://dx.doi.org/10.1117/1.JNP.8.083992


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