Plasmonic Interconnects

Current CMOS technology objection is to provide sufficient bandwidth and data rate at different levels of ON- and OFF-chip interconnection. Existing metallic interconnects are not capable of providing required bandwidth with minimum signal delay, cross-talk, and power dissipation. Integration of optics with electronics is proposed as a solution in order to meet the desired properties. Nevertheless, the challenge is to overcome the size mismatch between these two technologies, since optical components’ size is limited to the law of diffraction (optical components cannot be smaller than several fractions of propagation wavelength), while electronics is already operating at nanoscale dimension. Plasmonics technology is a favourable approach to address this problem as well.


Surface plasmon polaritons (SPPs) are defined as electromagnetic waves that propagate along an interface of two media with dielectric constants of opposite signs. Consequently, SPPs exist at dielectric-metal interface at optical frequencies (since É›metals < 0 and É›dielectrics > 0 at optical frequencies), and decay exponentially into both media.  For a structure comprised of a thin metallic layer of finite width, embedded in a homogenous dielectric, corner modes and finite length edge modes of metal couple to each other and form two symmetric and asymmetric modes. The so-called long-range surface plasmon (LR-SPP) is a symmetric mode, and its low attenuation constant leads to an increase in its propagation length. Additionally, since this structure is composed of metallic layer it has the potential to carry electrical signal as well as optical signal.



At Photonic DataCom team, we are working on simulation, fabrication, and characterization of LR-SPPs waveguides, hoping to realize optimal optical and electrical data transmission through surface plasmon waveguides.

February 2014

  • Meet Prof. Liboiron-Ladouceur and her student Peicheng Liao who will be at OFC 2014 presenting our recent paper from the RODIN project: "Gain Effect on the Scalability of SOA-based Optical Space Switches" (paper M3E.5).

    September 2013

    • We wish the best to our team members Xi Lu who graduated with an M.Eng now working at Ciena and Postdoc Mehrdad Mirshafiei now with the R&D team at Ericsson.

      August 2013

      • Meet Prof. Liboiron-Ladouceur at ECOC 2013 in London where she will present on September 25 "A Compact Silicon-on-Insulator Optical Hybrid for Low Loss Integration with Balanced Photodetectors," paper We.2.B.2.

      June 2013

      • Meet one of our Photonic DataCom team members at the IEEE Summer Topicals this summer in July were we will present our recent work. Prof. Liboiron-Ladouceur is also giving an invited presentation at Photonics in Switching on July 5th in Kyoto, Japan.

      September 2012

      • The Photonic DataCom team presented two papers (WM4 and TuI3) at the IEEE Photonics Society Conference in San Francisco next September.

      Summer 2012

      • Professor Liboiron-Ladouceur is Chapter Chair of the IEEE Photonics Society. For information about local events go to website

      • The Photonic DataCom team presented three papers at the SPIE Photonics North Conference in Montreal.

      May 2012

      • We congratulate Mr. Meer Sakib for receiving the SPIE Graduate Scholarship.

      February 2012

      • Our project RODIN was awarded the Premio Venezia from the Italian Chamber of Commerce in Canada honouring excellence in collaborations between Quebec and Italy.

      October 2011

      • Professor Liboiron-Ladouceur has been awarded a Canada Research Chair in Photonic Interconnects

      • The Photonic DataCom team presented three papers at the IEEE Photonics Conference in Arlington, VA (Oct. 9-13)

      September 2011

      • We wish the best to Mr. Venkat Mahalingam (M.Eng. 2011) who is now working at Telus in Montreal as a network design engineer

      August 2011

      • We congratulate Mr. Meer Sakib for receiving the Vanier Canada Graduate Scholarship