2026-05-28T10:06:52Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/341682026-02-03T11:12:37Zcom_10630_2254col_10630_37953

Luque-González, José Manuel Herrero-Bermello, Alaine Ortega-Moñux, Alejandro Sánchez-Rodriguez, Marina Velasco, Aitor V. Schmid, Jens Cheben, Pavel Molina-Fernández, Íñigo Halir, Robert 2024-10-02T07:49:49Z 2024-10-02T07:49:49Z 2020 José Manuel Luque-González, Alaine Herrero-Bermello, Alejandro Ortega-Moñux, Marina Sánchez-Rodríguez, Aitor V. Velasco, Jens H. Schmid, Pavel Cheben, Íñigo Molina-Fernández, and Robert Halir. (2020). Polarization splitting directional coupler using tilted subwavelength gratings,. Opt. Lett. 45 (13), 3398-3401 . doi.org/10.1364/OL.394696 https://hdl.handle.net/10630/34168 https://doi.org/10.1364/OL.394696 On-chip polarization splitters are key elements for coherent optical communication systems and polarization diversity circuits. These devices are often implemented with directional couplers that are symmetric for one polarization and strongly asymmetric for the other polarization. To achieve this asymmetry, highly dissimilar waveguides are used in each coupler arm, often requiring additional material layers or etch steps. Here we demonstrate polarization splitting with a directional coupler composed of two fully etched subwavelength waveguides, differing only in the tilt angle of the silicon segments. Our device exhibits deep-UV compatible feature sizes, is 14 µm long, and covers a 72 nm bandwidth with insertion losses below 1 dB and an extinction ratio in excess of 15 dB. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Fotones -- Polarización Polarization splitting directional coupler using tilted subwavelength gratings journal article