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.
Noncollinear type II second harmonic generation in Al[sub (0.3)]Ga[sub (0.7)]As/Al[sub 2]O[sub 3] one-dimensional photonic bandgap structure / Alessio, Bosco; Centini, Marco; Letizia, Sciscione; Fazio, Eugenio; Sibilia, Concetta; Andrea, Fiore; Luciana, Cerri; Michael, Scalora; AND MARIO BERTOLOTTI,. - 5450(2004), p. 269. [10.1117/12.545876].
Noncollinear type II second harmonic generation in Al[sub (0.3)]Ga[sub (0.7)]As/Al[sub 2]O[sub 3] one-dimensional photonic bandgap structure
CENTINI, MARCO;EUGENIO FAZIO;SIBILIA, Concetta;
2004
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
