Polarization- and wavelength-agnostic nanophotonic beam splitter View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

David González-Andrade, Christian Lafforgue, Elena Durán-Valdeiglesias, Xavier Le Roux, Mathias Berciano, Eric Cassan, Delphine Marris-Morini, Aitor V. Velasco, Pavel Cheben, Laurent Vivien, Carlos Alonso-Ramos

ABSTRACT

High-performance optical beam splitters are of fundamental importance for the development of advanced silicon photonics integrated circuits. However, due to the high refractive index contrast of silicon-on-insulator platforms, state-of-the-art nanophotonic splitters are hampered by trade-offs in bandwidth, polarization dependence and sensitivity to fabrication errors. Here, we present a new strategy that exploits modal engineering in slotted waveguides to overcome these limitations, enabling ultra-broadband polarization-insensitive optical power splitters with relaxed fabrication tolerances. The proposed splitter design relies on a single-mode slot waveguide that is gradually transformed into two strip waveguides by a symmetric taper, yielding equal power splitting. Based on this concept, we experimentally demonstrate -3 ± 0.5 dB polarization-independent transmission for an unprecedented 390 nm bandwidth (1260-1650 nm), even in the presence of waveguide width deviations as large as ±25 nm. More... »

PAGES

3604

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-019-40497-7

DOI

http://dx.doi.org/10.1038/s41598-019-40497-7

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112544134

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30837661


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