CEA-Leti Achieves Major Milestone in Metal-Oxide-Semiconductor Photonics

CEA-Leti, a leading European research and development institute in the field of silicon photonics technology, today announced that it has demonstrated the efficient integration of silicon photonic devices with fully complementary metal-oxide semiconductor (CMOS)-compatible plasmonic optical waveguides.

This new capability sets the stage for the fabrication of smaller, faster and more efficient opto-electronic interfaces, which could ultimately allow the development of significantly higher-performance sensors, computer chips and other electronic components.

Waveguides, including optical fibers, are used to transmit signals and power in a variety of radio and optical communications uses. Leti’s new devices channel light through a narrow silicon waveguide placed in close proximity to a metal waveguide, causing the light to excite small, high-frequency electromagnetic waves, known as surface plasmons, in the metallic structures. The resulting devices can convert optical signals in the 1.5 micrometers (µm) communications band into plasmonic electron waves, and convert the plasmonic waves back into optical signals.

Leti’s pioneering combination of extremely small plasmonic-optical interfaces that connect to standard optical fibers provides high coupling efficiencies (up to 70 percent) over a wide spectral range. And unlike previous devices that have relied on metal waveguides made from gold, Leti’s metal waveguides are fabricated with copper, allowing them to be easily integrated into standard CMOS chip manufacturing processes.

“This demonstration of CMOS-compatible plasmonic-optical technology is a major milestone in the emerging field of metal-oxide-semiconductor photonics,” said Laurent Fulbert, Photonics Programs Manager at Leti. “By concentrating light into very small modes, we can provide an efficient optical interface between the macroscopic world of optical fibers and the nano-scale world of transistors and molecular electronic devices.”

The plasmonic-optical devices were designed and fabricated by Leti, which collaborated with France’s Université de Technologie de Troyes (UTT) for additional near-field scanning optical microscope testing and characterization. The project results were presented earlier this month at the Group Four Photonics 2010 show in Beijing, and published in Nano Letters, a journal of the American Chemical Society.

Source: http://www.leti.fr/


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    CEA-Leti. (2019, February 13). CEA-Leti Achieves Major Milestone in Metal-Oxide-Semiconductor Photonics. AZoNano. Retrieved on August 17, 2022 from https://www.azonano.com/news.aspx?newsID=19821.

  • MLA

    CEA-Leti. "CEA-Leti Achieves Major Milestone in Metal-Oxide-Semiconductor Photonics". AZoNano. 17 August 2022. <https://www.azonano.com/news.aspx?newsID=19821>.

  • Chicago

    CEA-Leti. "CEA-Leti Achieves Major Milestone in Metal-Oxide-Semiconductor Photonics". AZoNano. https://www.azonano.com/news.aspx?newsID=19821. (accessed August 17, 2022).

  • Harvard

    CEA-Leti. 2019. CEA-Leti Achieves Major Milestone in Metal-Oxide-Semiconductor Photonics. AZoNano, viewed 17 August 2022, https://www.azonano.com/news.aspx?newsID=19821.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type