We study numerically the dependence of dispersive and birefringence properties of silicon nanowires on waveguide dimensions and show that they have a strong geometrical dependence when nanowire dimensions become comparable to the wavelength of light inside the device. We develop a graphical method for engineering two or more dispersion parameters simultaneously and use it to demonstrate the possibility of fabricating silicon nanowires with flattened dispersion curves over a wide spectral range with normal or anomalous nominal values. We quantify polarization-mode dispersion through the differential group delay and show that it can acquire large values for properly designed nanowires. Our analysis should help in designing silicon-based photonic integrated circuits.
© 2010 Optical Society of America
Original Manuscript: October 2, 2009
Revised Manuscript: December 14, 2009
Manuscript Accepted: December 15, 2009
Published: January 13, 2010
Brian A. Daniel and Govind P. Agrawal, "Dependence of dispersive and birefringence properties of silicon nanowires on waveguide dimensions," Opt. Lett. 35, 190-192 (2010)