Rib chalcogenide glass waveguide with simultaneous dispersion flatting for both transverse electric and magnetic modes

A rib chalcogenide glass waveguide with simultaneous dispersion engineering for both fundamental quasi-TE mode and quasi-TM mode is numerically demonstrated. Dispersions of approximately ±100 ps/nm/km over a 4200-nm bandwidth for the quasi-TE mode and of approximately ±120 ps/nm/km over a 2350-nm bandwidth for the quasi-TM mode are observed. Dispersion design for both polarizations can be independently realized by tuning the structural parameters. Moreover, this waveguide can support broadband FWM processes and have potential applications from near-infrared to middle-infrared region based on the polarization effect.