Dispersive wave generation in As_2S_3 slot waveguide with four zero-dispersion wavelengths

摘要

We propose As_2S_3 slot waveguides, which have four zero-dispersion wavelengths and exhibit a flattened and low dispersion over a 1800-nm bandwidth from near-IR to mid-IR wavelength range. The dispersive wave generation is investigated based on this kind of dispersive profile by launching femtosecond pulses into As_2S_3 waveguides. Detailed simulations under realistic conditions show that considerable amount of dispersive wave emission occur in As_2S_3 waveguide and therefore can be desirable for optical communication and on-chip signal processing, such as frequency metrology, optical coherence tomography and microscopy.