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Proceedings Paper

Second harmonic generation in GaN-based photonic crystals for single molecule investigations
Author(s): Dominique Coquillat; Jérémie Torres; Marine Le Vassor d'Yerville; David Cassagne; Frédéric Teppe; Nina Dyakonova; Wojciech Knap; Richard De La Rue; Sophie Bouchoule; Emmanuel Margeat; Catherine Royer
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Paper Abstract

III-Nitride semiconductors are promising nonlinear materials for optical wavelength conversion. However second harmonic generation in bulk GaN is weak because GaN is strongly dispersive. We show that appropriate photonic crystal patterning in GaN helps to overcome dispersion and provides quasi-phase matching conditions, resulting in substantially increased conversion efficiency obtained in a flexible manner. Enhancement factors of more than five orders of magnitude can be achieved. Use of photonic crystals makes it possible to reduce the effective observation volume, thereby opening new opportunities such as the study of single-molecule dynamics, even in high concentration solutions. We have demonstrated sharp enhancement of the fluorescence of single molecules immobilized on the surface of a GaN photonic crysta,l when the molecules are excited via the resonant second harmonic generation process.

Paper Details

Date Published: 27 February 2012
PDF: 7 pages
Proc. SPIE 8262, Gallium Nitride Materials and Devices VII, 82621R (27 February 2012); doi: 10.1117/12.905593
Show Author Affiliations
Dominique Coquillat, Lab. Charles Coulomb, CNRS, Univ. Montpellier 2 (France)
Jérémie Torres, Institut d'Électronique du Sud, CNRS, Univ. Montpellier 2 (France)
Marine Le Vassor d'Yerville, Lab. Charles Coulomb, CNRS, Univ. Montpellier 2 (France)
David Cassagne, Lab. Charles Coulomb, CNRS, Univ. Montpellier 2 (France)
Frédéric Teppe, Lab. Charles Coulomb, CNRS, Univ. Montpellier 2 (France)
Nina Dyakonova, Lab. Charles Coulomb, CNRS, Univ. Montpellier 2 (France)
Wojciech Knap, Lab. Charles Coulomb, CNRS, Univ. Montpellier 2 (France)
Richard De La Rue, Univ. of Malaya (Malaysia)
Sophie Bouchoule, Lab. de Photonique et de Nanostructures, CNRS (France)
Emmanuel Margeat, Ctr. de biochimie Structurale, CNRS, Univ. Montpellier 1 (France)
Catherine Royer, Ctr. de biochimie Structurale, CNRS, Univ. Montpellier 1 (France)


Published in SPIE Proceedings Vol. 8262:
Gallium Nitride Materials and Devices VII
Jen-Inn Chyi; Yasushi Nanishi; Hadis Morkoç; Joachim Piprek; Euijoon Yoon, Editor(s)

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