Conformal dielectric overlayers for engineering dispersion and effective nonlinearity of silicon nanophotonic wires.
ABSTRACT We introduce and study numerically a method for dispersion engineering of Si nanophotonic wires using a thin conformal silicon nitride film deposited around the Si core. Simulations show that this approach may be used to achieve the dispersion characteristics required for broadband, phase-matched, four-wave mixing processes, while simultaneously maintaining strong modal confinement within the Si core for high effective nonlinearity.
Conference Proceeding: Optimal design of silicon-on-insulator nano-wire waveguides for broadband wavelength conversion[show abstract] [hide abstract]
ABSTRACT: The size of a silicon-on-insulator nano-wire waveguide is optimized for broadband wavelength conversion. A 3-dB conversion bandwidth of over 250 nm is achieved through four-wave mixing in a 2.5-mm-long waveguide of size 425 nm times 258 nm.Optical Fiber Communication & Optoelectronic Exposition & Conference, 2008. AOE 2008. Asia; 12/2008