Polarization-independent multimode interference coupler with anisotropy-engineered bricked metamaterial

Many applications, including optical multiplexing, switching, and detection, call for low-cost and broadband photonic devices with polarization-independent operation. While the silicon-on-insulator platform is well positioned to fulfill most of these requirements, its strong birefringence hinders th...

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Bibliographic Details
Published in:Photonics research (Washington, DC) DC), 2022-04, Vol.10 (4), p.A57
Main Authors: Pérez-Armenta, Carlos, Ortega-Moñux, Alejandro, Manuel Luque-González, José, Halir, Robert, Reyes-Iglesias, Pedro J., Schmid, Jens, Cheben, Pavel, Molina-Fernández, Íñigo, Wangüemert-Pérez, J. Gonzalo
Format: Article
Language:English
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Summary:Many applications, including optical multiplexing, switching, and detection, call for low-cost and broadband photonic devices with polarization-independent operation. While the silicon-on-insulator platform is well positioned to fulfill most of these requirements, its strong birefringence hinders the development of polarization-agnostic devices. Here we leverage the recently proposed bricked metamaterial topology to design, for the first time, to our knowledge, a polarization-independent 2 × 2 multimode interference coupler using standard 220 nm silicon thickness. Our device can be fabricated with a single etch step and is optimized for the O-band, covering a wavelength range of 160 nm with excess loss, polarization-dependent loss, and imbalance below 1 dB and phase errors of less than 5°, as demonstrated with full three-dimensional finite-difference time-domain simulations.
ISSN:2327-9125
2327-9125
DOI:10.1364/PRJ.446932