The feasibility of a modal phase matching scheme between optical modes and surface plasmonic modes is demonstrated: in fact, the high effective index of a plasmonic mode allows us to obtain phase matching even in semiconductors showing a large dispersion between fundamental and second harmonic wavelengths. We design a realistic device to obtain Type-II second harmonic generation in AlGaAs-based waveguides; whereas one of the two pumps is carried by a plasmonic mode, the generated second harmonic signal is guided inside the AlGaAs multilayer, and hence it is not hampered by high propagation losses.
© 2012 Optical Society of America
Optics at Surfaces
Original Manuscript: February 17, 2012
Revised Manuscript: April 3, 2012
Manuscript Accepted: April 19, 2012
Published: June 6, 2012
F. M. Pigozzo, D. Modotto, and S. Wabnitz, "Second harmonic generation by modal phase matching involving optical and plasmonic modes," Opt. Lett. 37, 2244-2246 (2012)