High efficiency coupling to metal-insulator-metal plasmonic waveguides

Yoav Blau, Timor Gilad, Yael Hanein, Amir Boag, Jacob Scheuer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A periodic array of dual-Vivaldi antennas integrated with metal-insulator-metal (MIM) plasmonic waveguides was designed and investigated for its infrared light absorbance efficiency. Full-wave analysis was used to optimize MIM waveguides compatible with parallel and series connected DC leads without sacrificing radiation efficiency. Free-space to MIM waveguide in-coupling efficiency as high as 41% has been obtained in a sub-wavelength unit cell geometry at a wavelength of 1373 nm. Higher efficiency, up to 85%, is predicted with a modified design including a backplane reflector. A nanofabrication process was developed to realize test devices and far-field optical spectroscopy was used as experimental evidence for antenna-waveguide matching.

Original languageEnglish
Pages (from-to)13757-13764
Number of pages8
JournalOptics Express
Issue number8
StatePublished - 11 Apr 2022


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