RT Journal Article
T1 Polarization splitting directional coupler using tilted subwavelength gratings
A1 Luque-González, José Manuel
A1 Herrero-Bermello, Alaine
A1 Ortega-Moñux, Alejandro
A1 Sánchez-Rodriguez, Marina
A1 Velasco, Aitor V.
A1 Schmid, Jens
A1 Cheben, Pavel
A1 Molina-Fernández, Íñigo
A1 Halir, Robert
K1 Fotones -- Polarización
AB 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.
PB Optica Publishing Group
YR 2020
FD 2020
LK https://hdl.handle.net/10630/34168
UL https://hdl.handle.net/10630/34168
LA eng
NO 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
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026