Silicon Photonic Bragg Grating Structures for Spectral Filtering.

Integrated optical filters play a key role in modern optical systems, finding extensive applications in quantum optics, biosensing, programmable photonics, and telecommunications. Among the most commonly used structures utilized for implementing integrated optical filters are ring resonators and Bragg gratings. Bragg gratings are characterized by a periodically perturbed refractive index profile along the propagation direction. By precisely engineering the strength of the perturbation along the grating length, filters with arbitrary spectral responses can be achieved. In this work we summarize our recent contributions to integrated Bragg filters in Si-photonics, covering designs for applications ranging from telecommunications to quantum optics.We acknowledge funding from the Ministerio de Economía y Competitividad, PID2019- 106747RB-I00, PRE2020-096438, PID2020-115204RB-I00, TED2021-130400B-I00, Ministerio de Ciencia, Innovación y Universidades, FPU19/02408, FPU21/04914, Junta de Andalucía P18-RT-1453, P18-RT-793, UMA-FEDERJA-158, National Research Council Canada (CSTIP, HTSN210, STR2-0102); and Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Subwavelength metamaterial structures for silicon photonics

Sub-wavelength periodic metamaterial structures are enabling the design of silicon photonic devices with unprecedented performance in the near infrared band. However, for applications in the promising mid-infrared band it is expected that they acquire even more prominence because for longer wavelengths it is far easier to fabricate structures with a sub- wavelength pitch. Here we report our recent progress in the electromagnetic modeling of sub-wavelength structures, and we will review some of our latest advances in the development of sub-wavelength based devices operating both at near and mid- infrared wavelengths.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech