Abstract

Recent progress in the development of electric-field poling techniques for the patterning of the domain structure of ferroelectric materials has enabled the implementation of distinctive quasiphase-matched (QPM) structures for efficient nonlinear optical interactions.¹ Such QPM devices have been fabricated in LiNbO₃, LiTaO₃, and in the KTP-family crystals. Semiconductor materials which have larger nonlinear coefficients (χ⁽²⁾), are also promising candidates for efficient frequency up/down conversion. However, the technology employed at present to fabricate semiconductor QPM devices suffers from limitations such as difficulty in producing and stacking thin plates for first-order QPM.

© 2002 Optical Society of America