On-chip molecular electronic plasmon sources based on self-assembled monolayer tunnel junctions

Wei Du, Tao Wang, Hong-Son Chu, Lin Wu, Rongrong Liu, Song Sun, Wee Kee Phua, Lejia Wang, Nikodem Tomczak*, Christian A. Nijhuis

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

116 Citations (Scopus)


Molecular electronic control over plasmons offers a promising route for on-chip integrated molecular plasmonic devices for information processing and computing. To move beyond the currently available technologies and to miniaturize plasmonic devices, molecular electronic plasmon sources are required. Here, we report on-chip molecular electronic plasmon sources consisting of tunnel junctions based on self-assembled monolayers sandwiched between two metallic electrodes that excite localized plasmons, and surface plasmon polaritons, with tunnelling electrons. The plasmons originate from single, diffraction-limited spots within the junctions, follow power-law distributed photon statistics, and have well-defined polarization orientations. The structure of the self-assembled monolayer and the applied bias influence the observed polarization. We also show molecular electronic control of the plasmon intensity by changing the chemical structure of the molecules and by bias-selective excitation of plasmons using molecular diodes.
Original languageEnglish
Pages (from-to)274-280
JournalNature photonics
Issue number4
Publication statusPublished - Apr 2016
Externally publishedYes


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