Bilayer dispersion-flattened waveguides with four zero-dispersion wavelengths.
We propose a new type of bilayer dispersion-flattened waveguides that have four zero-dispersion wavelengths. Low and flat dispersion can be achieved by using two different material combinations, with a much smaller index contrast as compared to the previously proposed slot-assisted dispersion-flattened waveguides. Without using a nano-slot, dispersion becomes less sensitive to waveguide dimensions, which is highly desirable for high-yield device fabrication. Ultra-low dispersion, high nonlinearity, and fabrication-friendly design would make it promising for practical implementation of nonlinear photonic functions. The proposed waveguide configuration deepens our understanding of the dispersion flattening principle.
Yuhao
Y
Guo
Zeinab
Z
Jafari
Anu M
AM
Agarwal
Lionel C
LC
Kimerling
Guifang
G
Li
Jurgen
J
Michel
Lin
L
Zhang