Supercontinuum generation in silicon Bragg grating waveguide

Supercontinuum generation is an extensively studied and arguably the most important all-encompassing nonlinear phenomenon. Yet, we do not have a good control over all signals generated in this process. Usually large part of octave spanning spectrum has orders magnitude too much weaker signal than peak to be useful for any application. In work show strong within supercontinuum using silicon Bragg grating waveguide. We up 23 dB enhancement 10 nm full-width-at-half-maximum bandwidth at resonance telecom window. Since made by depositing charge carriers periodically, thus avoiding dimensional change waveguide, it can allow other functionalities offered induced electric field, such as second harmonic generation. The ease fabrication, whether with variation or doping, makes device enhancing strength desired frequencies high precision independent material platform. believe opens new avenue on demand integrated photonics.