Phase matched noncollinear second harmonic generation in 2hyphen;methylhyphen;4hyphen;nitroaniline singlehyphen;crystal film waveguide

摘要

Phase matched noncollinear second harmonic generations (SHGs) are observed in 2hyphen;methylhyphen;4hyphen;nitroaniline (MNA) singlehyphen;crystal film waveguides. The phase matching condition is obtained by the cross point of the mode dispersion curves for the MNA waveguide. Theoretical analysis of the SHG conversion efficiency shows that the maximum efficiency is given by the conversion between the fundamental 1st mode and the SH 3rd mode. The experimental efficiency at this conversion is obtained to be 0.10percnt; in the waveguide.