15 September 2004 Noncollinear type II second harmonic generation in Al(0.3)Ga(0.7)As/Al2O3 one-dimensional photonic bandgap structure
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Proceedings Volume 5450, Photonic Crystal Materials and Nanostructures; (2004); doi: 10.1117/12.545876
Event: Photonics Europe, 2004, Strasbourg, France
Abstract
We have designed a one-dimensional photonic bandgap crystal to obtain perfect phase-matching conditions for noncollinear type II quadratic processes. The realized sample was 15 periods of Al(0.3)Ga(0.7)As/Al2O3, for a total length of 3.5um. Noncollinear type II phase-matching was obtained at 1510nm. We have experimentally verified the band structure characteristic as well as its perfect phase-matching for the noncollinear type II parametric process. Indeed, noncollinear type II second harmonic generation was obtained for the first time in a PBG crystal1. The experiment demonstrated that the breaking of symmetry, which is artificially induced in such a structure, and the field resonance effect give rise to a relatively efficient second harmonic generation even using a naturally isotropic material (AlGaAs). In fact, we report a nonlinear effective coefficient of the sample equal to (52±12) pm/V.
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Alessio Bosco, Marco Centini, Letizia Sciscione, Eugenio Fazio, Concita Sibilia, Andrea Fiore, Luciana Cerri, Michael Scalora, Mario Bertolotti, "Noncollinear type II second harmonic generation in Al(0.3)Ga(0.7)As/Al2O3 one-dimensional photonic bandgap structure", Proc. SPIE 5450, Photonic Crystal Materials and Nanostructures, (15 September 2004); doi: 10.1117/12.545876; https://doi.org/10.1117/12.545876
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KEYWORDS
Photonic crystals

Crystals

Harmonic generation

Second-harmonic generation

Aluminum

Gallium

Phase modulation

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