Silicon photonic mode multiplexers based on subwavelength metamaterials and on-chip beam forming

D. González-Andrade*, R. Fernández de Cabo, J. Vilas, T. T.D. Dinh, J. M. Luque-González, D. Oser, G. Aubin, F. Amar, A. Dias, More Authors

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Integration of photonic circuits on silicon offers a unique opportunity to address the scaling of inter- and intra-chip communications in an energy-efficient and cost-effective manner. Mode-division multiplexing (MDM) is deemed as one of the most promising technologies to increase aggregated data bandwidth and avoid a communication capacity crunch. In this invited talk, we review our latest advances on integrated silicon mode multiplexers, including new topologies based on subwavelength grating (SWG) metamaterials for extended broadband operation and higher-order mode support. Specifically, we report on an ultra-broadband multiplexer based on a phase shifter and a multimode interference (MMI) coupler both engineered with subwavelength metamaterials. Experimental measurements of a complete multiplexer-demultiplexer link show losses lower than 2 dB and crosstalk below -17 dB over a bandwidth of 245 nm (1427 – 1672 nm).

Original languageEnglish
Title of host publicationSmart Photonic and Optoelectronic Integrated Circuits 2023
EditorsSailing He, Sailing He, Laurent Vivien
Number of pages5
ISBN (Electronic)9781510659551
Publication statusPublished - 2023
EventSmart Photonic and Optoelectronic Integrated Circuits 2023 - San Francisco, United States
Duration: 31 Jan 20232 Feb 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSmart Photonic and Optoelectronic Integrated Circuits 2023
Country/TerritoryUnited States
CitySan Francisco

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • metamaterials
  • mode-division multiplexing
  • Photonic integrated circuits
  • silicon photonics
  • subwavelength gratings


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