We analyze phase matching with reference to frequency doubling in nanosized quadratic waveguides encompassing form birefringence and supporting cross-polarized fundamental and second-harmonic modes. In an AlGaAs rod with an air void, we show that phase-matched second-harmonic generation could be achieved in a wide spectral range employing state-of-the-art nanotechnology. (c) 2006 Optical Society of America
Di Falco, A., Conti, C., Assanto, G. (2006). Quadratic phase matching in slot waveguides. OPTICS LETTERS, 31(21), 3146-3148 [10.1364/OL.31.003146].