We study the frequency dependence of the optical nonlinearity of Si photonic nanowires (Si-PNWs) and its influence on the propagation of ultrashort optical pulses in such nanodevices. Specifically, we show that Si-PNWs present a remarkably large characteristic time associated with self-steepening effects and optical shock formation, namely, more than an order of magnitude larger than in the case of photonic crystal fibers.
© 2009 Optical Society of America
Original Manuscript: December 3, 2008
Revised Manuscript: January 26, 2009
Manuscript Accepted: January 27, 2009
Published: March 19, 2009
Nicolae C. Panoiu, Xiaoping Liu, and Richard M. Osgood Jr., "Self-steepening of ultrashort pulses in silicon photonic nanowires," Opt. Lett. 34, 947-949 (2009)