Abstract

Quasi-phase-matching (QPM) in ferroelectrics is based on periodical structuring of the second-order nonlinearity by locally inverting the sign of the χ⁽²⁾ susceptibility. Due to symmetry reasons this sign inversion does not affect pure odd-order susceptibilities such as χ⁽¹⁾ (refractive index) or χ⁽³⁾. (Kerr effect). The corollary of this simplified picture is that stimulated Raman scattering (SRS), which is also an odd-order effect, should not be affected by the spatial structuring of the ferroelectric domains. In this work we will show that this is not the case and that structuring the ferroelectric does indeed present an opportunity to control the SRS process.

© 2009 IEEE