Low-loss optical waveguides made with a high-loss material

Darius Urbonas; Rainer F. Mahrt; Thilo Stöferle

doi:10.1038/s41377-020-00454-w

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Low-loss optical waveguides made with a high-loss material

Letters

- Low-loss optical waveguides made with a high-loss material
- Low-loss optical waveguides made with a high-loss material
- LSA 2021年10卷第1期页码：12-18
- Affiliations：
  
  IBM Research Europe—Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
- Author bio：
  
  Thilo Stöferle (tof@zurich.ibm.com)
- Funds：
- DOI：10.1038/s41377-020-00454-w
  中图分类号：
- 纸质出版日期：2021，
  
  网络出版日期：2021-01-12，
  
  收稿日期：2020-06-04，
  
  修回日期：2020-12-02，
  
  录用日期：2020-12-14
- Accepted：
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Low-loss optical waveguides made with a high-loss material[J]. LSA, 2021,10(1):12-18.

Urbonas, D., Mahrt, R. F. & Stöferle, T. Low-loss optical waveguides made with a high-loss material. Light: Science & Applications, 10, 12-18 (2021).
Low-loss optical waveguides made with a high-loss material[J]. LSA, 2021,10(1):12-18. DOI： 10.1038/s41377-020-00454-w.

Urbonas, D., Mahrt, R. F. & Stöferle, T. Low-loss optical waveguides made with a high-loss material. Light: Science & Applications, 10, 12-18 (2021). DOI： 10.1038/s41377-020-00454-w.

摘要

Abstract

For guiding light on a chip

it has been pivotal to use materials and process flows that allow low absorption and scattering. Based on subwavelength gratings

here

we show that it is possible to create broadband

multimode waveguides with very low propagation losses despite using a strongly absorbing material. We perform rigorous coupled-wave analysis and finite-difference time-domain simulations of integrated waveguides that consist of pairs of integrated high-index-contrast gratings. To showcase this concept

we demonstrate guiding of visible light in the wavelength range of 550–650 nm with losses down to 6 dB/cm using silicon gratings that have a material absorption of 13

000 dB/cm at this wavelength and are fabricated with standard silicon photonics technology. This approach allows us to overcome traditional limits of the various established photonics technology platforms with respect to their suitable spectral range and

furthermore

to mitigate situations where absorbing materials

such as highly doped semiconductors

cannot be avoided because of the need for electrical driving

for example

for amplifiers

lasers and modulators.

关键词

Keywords

references

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