Second Harmonic Generation in GaN-based photonic crystals for single molecule investigations - Laboratoire Charles Coulomb (L2C) Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

Second Harmonic Generation in GaN-based photonic crystals for single molecule investigations

Dominique Coquillat
  • Fonction : Auteur
  • PersonId : 869119
Jeremie Torres
Marine Le Vassor d'Yerville
  • Fonction : Auteur
David Cassagne
Frederic Teppe
Nina Diakonova
  • Fonction : Auteur
  • PersonId : 883858
Wojciech Knap
  • Fonction : Auteur
  • PersonId : 1011541
Richard de La Rue
  • Fonction : Auteur
Sophie Bouchoule
  • Fonction : Auteur
Emmanuel Margeat
Catherine Royer
  • Fonction : Auteur

Résumé

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.
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Dates et versions

hal-00704334 , version 1 (05-06-2012)

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Citer

Dominique Coquillat, Jeremie Torres, Marine Le Vassor d'Yerville, David Cassagne, Frederic Teppe, et al.. Second Harmonic Generation in GaN-based photonic crystals for single molecule investigations. GALLIUM NITRIDE MATERIALS AND DEVICES VII, Jan 2012, San Francisco (CA), United States. pp.82621R, ⟨10.1117/12.905593⟩. ⟨hal-00704334⟩
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