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

00925njm 22002777a 4500 dc Oser, Dorian author Pérez-Galacho, Diego author Le Roux, Xavier author Tanzilli, Sébastien author Vivien, Laurent author Labonté, Laurent author Cassan, Éric author Alonso-Ramos, Carlos author 2020-10-13 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. 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 Comunicaciones ópticas Silicon subwavelength modal Bragg grating filters with narrow bandwidth and high optical rejection