2026-06-03T04:47:54Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/339392026-02-03T11:16:33Zcom_10630_2254col_10630_37953

Oser, Dorian Pérez-Galacho, Diego Le Roux, Xavier Tanzilli, Sébastien Vivien, Laurent Labonté, Laurent Cassan, Éric Alonso-Ramos, Carlos 2024-09-29T18:54:29Z 2024-09-29T18:54:29Z 2020-10-13 Dorian Oser, Diego Pérez-Galacho, Xavier Le Roux, Sébastien Tanzilli, Laurent Vivien, Laurent Labonté, Éric Cassan, and Carlos Alonso-Ramos, "Silicon subwavelength modal Bragg grating filters with narrow bandwidth and high optical rejection," Opt. Lett. 45, 5784-5787 (2020) https://hdl.handle.net/10630/33939 10.1364/OL.394455 Waveguide Bragg grating filters with narrow bandwidth and high optical rejection are key func- tions for several advanced silicon photonics circuits. Here, we propose and demonstrate a new Bragg grating geometry that provides narrowband and high rejection response. It combines the advantages of subwavelength and modal engineering. As a proof-of-concept demonstration, we implement the proposed Bragg filters in the 220-nm-thick Si technology with a single etch step. We experimentally show flexible control of the filter selectivity, with measured null-to-null bandwidths below 2 nm, and strength of 60 dB rejection with a null-to-null bandwidth of 1.8 nm. eng open access Comunicaciones ópticas Silicon subwavelength modal Bragg grating filters with narrow bandwidth and high optical rejection journal article