Observation of (4)over-bar-quasi-phasematched second-harmonic generation in a GaAs microdisk cavity

We observed singly-resonant, (4) over bar -quasi-phasematched, second-harmonic generation in a GaAs microdisk cavity. By pumping at the 1985.4-nm fundamental resonance, we observed (5.2 +/- 0.4)x10(-5)/mW conversion efficiency.