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Related Experiment Video

Updated: May 14, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Silicon on ultra-low-loss waveguide photonic integration platform.

Jared F Bauters1, Michael L Davenport, Martijn J R Heck

  • 1Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106, USA. jbauters@ece.ucsb.edu

Optics Express
|February 8, 2013
PubMed
Summary

We developed a new integrated silicon and silicon nitride waveguide platform. This platform achieves low coupling loss and ultra-low propagation loss, enabling efficient light transmission for photonic integrated circuits.

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Area of Science:

  • Photonics and Materials Science
  • Integrated Optics

Background:

  • Silicon photonics offers high integration density but suffers from propagation losses.
  • Silicon nitride waveguides provide ultra-low loss but are challenging to integrate with silicon.
  • Efficient coupling between different waveguide materials is crucial for advanced photonic integrated circuits.

Purpose of the Study:

  • To demonstrate a novel integrated platform combining silicon and ultra-low-loss silicon nitride (Si3N4) waveguides.
  • To characterize the coupling efficiency and bandwidth between the silicon and Si3N4 layers.
  • To measure the propagation loss of the ultra-low-loss Si3N4 waveguides.

Main Methods:

  • Fabrication of a hybrid silicon and Si3N4 waveguide platform.
  • Design and implementation of tapered couplers for inter-layer coupling.

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Last Updated: May 14, 2026

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  • Optical characterization including loss and bandwidth measurements at 1590 nm wavelength.

    • Main Results:

    • Achieved coupling losses of (0.4 ± 0.2) dB and (0.8 ± 0.2) dB per transition for two different tapered coupler designs.
    • Demonstrated 3-dB bandwidths of 20 nm and 100 nm for the respective coupler designs.
    • Measured a minimum propagation loss of 1.2 dB/m in the ultra-low-loss Si3N4 waveguides at 1590 nm.

    Conclusions:

    • The integrated silicon and Si3N4 platform enables efficient coupling between materials with distinct optical properties.
    • The demonstrated low coupling loss and ultra-low propagation loss are promising for advanced photonic integrated circuits.
    • This hybrid platform opens new avenues for high-performance optical devices and systems.