High confinement electrically pumped metal-insulator-metal waveguide structures

Farhad Foroozandeh, Martin T. Hill

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Metal-insulator-metal (MIM) waveguide structures which propagate a plasmon gap like mode and also provide pathways for electrical pumping are proposed and investigated via simulations. Semiconductor pathways connect electrical contacts which are spatially separated from the waveguide mode to the gain medium, allowing electrically pumped amplification in the waveguide. Previously realized electrically pumped MIM waveguides have limitations for small device sizes, and other proposed waveguides rely on difficult to control wet etching to form the waveguide core. However, the structures proposed here allow the waveguide core to be precisely defined by lithography and dry etching. Furthermore, the active semiconductor surfaces are exposed in the early stages of the fabrication process, allowing good passivation. It is shown that the proposed structures have optical confinement and losses comparable to previous architectures.

Original languageEnglish
Pages (from-to)152-159
Number of pages8
JournalMicrowave and Optical Technology Letters
Issue number1
Early online date1 Dec 2020
Publication statusPublished - Jan 2021


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