Selective engineering of cavity resonance for frequency matching in   optical parametric processes
  We propose to selectively engineer a single cavity resonance to achieve frequency matching for optical parametric processes in high-Q microresonators. For this purpose, we demonstrate an approach, selective mode splitting (SMS), to precisely shift a targeted cavity resonance, while leaving other cavity modes intact. We apply SMS to achieve efficient parametric generation via four-wave mixing in high-Q silicon microresonators. The proposed approach is of great potential for broad applications in integrated nonlinear photonics. 
Xiyuan Lu, Steven Rogers, Wei C. Jiang, and Qiang Lin
physics.optics