On-chip Pulse Self-compression to Single-cycle Level in Silicon-rich Nitride Waveguides

We propose a siliconrich nitride waveguide with slot-assisted dispersion flattening, which is particularly suitable for on-chip pulse self-compression from 200 to 5.4 fs (1.08 optical cycles, with a compression factor as high as 37), accompanied by octave-wide supercontinuum generation, from 804 to 2645 nm. The compact pulse compressor to a single-cycle level without subsequent dispersion compensation can open a door to cycle-level pulse manipulation on a chip.