Flexible control of silicon Bragg grating filters enabled by subwavelength and modal engineering

Bragg filters stand as a key building blocks of the silicon-oninsulator photonics platform. However, achieving narrowband Bragg filters with large rejection is challenging due to fabrication constraints and imperfections. Here, we present our recent results in de development highperformance Bragg filters based on subwavelength and modal engineering. We experimentally show flexible control over the width and depth of the Bragg resonance. These results pave the way towards high-performance on-chip wavelength filters.