A large phase shift of 4.7pi at 1.53 µm has been observed from a low-loss (0.2 dB/cm), small-core As2S3 waveguide fabricated by dry etching. The strength of the nonlinear response was limited by photosensitivity and photocrystallization of the As2S3 films at 1.53 µm, far below the material bandgap.
© 2005 Optical Society of America
(160.2750) Materials : Glass and other amorphous materials
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
Yinlan Ruan, Barry Luther-Davies, Weitang Li, Andrei Rode, Vesslin Kolev, and Steve Madden, "Large phase shifts in As2S3 waveguides for all-optical processing devices," Opt. Lett. 30, 2605-2607 (2005)