Amorphous Silicon Nanowires with Low Two-Photon Absorption, High   Nonlinearity and Good Stability
  We demonstrate optically stable amorphous silicon nanowires with both high nonlinear figure of merit (FOM) of ~5 and high nonlinearity Re({\gamma}) = 1200W-1m-1. 
C.Grillet, L. Carletti, C. Monat, P. Grosse, B. Ben Bakir, S. Menezo,   J.M. Fedeli, and D. J. Moss
physics.optics