On-Chip Molecular Electronic Plasmon Sources Based on Self-Assembled Monolayer Tunnel Junctions

27/05/2016 @ 12:15 PM – 1:55 PM Asia/Singapore Timezone
S16 Level 6 – Theory conference room

Speaker: Du Wei
Affiliation: The Nijhuis Group
Abstract Details: Molecular electronic control over plasmons offers a promising route for on-chip integrated molecular-plasmonic devices for information processing and computing. In this seminar, I will discuss on-chip molecular electronic plasmon sources consisting of tunnel junctions based on self-assembled monolayers (SAMs) sandwiched between two metallic electrodes that excite localized plasmons and surface plasmon polaritons by tunnelling electrons. The plasmons originate from single, diffraction-limited spots within the junctions, follow power-law distributed photon statistics, and have well-defined polarisation orientations. The structure of the SAM 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.