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Your search keyword '"Resonant second-harmonic generation"' showing total 2 results
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2 results on '"Resonant second-harmonic generation"'

1. Resonant second-harmonic generation and mode dispersion in photonic crystal waveguides

Author

Lucio Claudio Andreani, Giorgio Guizzetti, A. M. Malvezzi, Adriana Passaseo, F. Romanato, G. Vecchi, E. Di Fabrizio, Maddalena Patrini, and Luca Businaro

Subjects
Chemistry, business.industry, Resonant second-harmonic generation, Photonic integrated circuit, Physics::Optics, Second-harmonic generation, Nonlinear optics, photonic crystal waveguides, Condensed Matter Physics, Yablonovite, Electronic, Optical and Magnetic Materials, Optics, Dispersion (optics), Reflection (physics), Photonics, business, Photonic crystal
Abstract

Linear and nonlinear optical measurements on GaAs/AlGaAs photonic crystal waveguides with square lattice are reported. Second-harmonic generation in reflection shows a resonant enhancement when the pump beam is frequency- and momentum-matched to a photonic mode in the slab. A full three-dimensional theory of waveguide-embedded photonic crystals allows to determine the dispersion of photonic modes and the intrinsic radiative losses of quasi-guided modes lying above the light line.

Published
2003

2. Resonant second-harmonic generation in a GaAs photonic crystal waveguide

Author

Luca Businaro, Lucio Claudio Andreani, M. De Vittorio, Giorgio Guizzetti, Maddalena Patrini, Filippo Romanato, G. Vecchi, A. Passaseo, E. Di Fabrizio, A. M. Malvezzi, A. M., Malvezzi, G., Vecchi, M., Patrini, G., Guizzetti, L. C., Andreani, F., Romanato, L., Businaro, E., DI FABRIZIO, A., Passaseo, and DE VITTORIO, Massimo

Subjects
Physics, business.industry, Resonant second-harmonic generation, GaAs, photonic crystal waveguides, Second-harmonic generation, Physics::Optics, Spectral line, Momentum, Reflection (mathematics), Dispersion (optics), Optoelectronics, Photonics, Atomic physics, business, Anisotropy, Photonic crystal
Abstract

Second-harmonic generation (SHG) measurements in reflection on a ${\mathrm{G}\mathrm{a}\mathrm{A}\mathrm{s}/\mathrm{A}\mathrm{l}}_{0.25}{\mathrm{Ga}}_{0.75}\mathrm{As}$ photonic crystal waveguide show a resonant enhancement when the pump beam is frequency and momentum matched with the photonic modes in the slab. The enhanced SH signal is observed in the form of resonant peaks, unlike in linear reflectance spectra. The observations are in very good agreement with a full 3D calculation of the anisotropic mode dispersion in the photonic crystal slab. The present results open the way towards realizing the extraordinary enhancement of SHG which was recently predicted [A. R. Cowan and J. F. Young, Phys. Rev. B $65,$ 085106 (2002)], and also demonstrate the potential of SHG as a nonlinear spectroscopic tool for optical studies of photonic crystals.

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