Light Emission and Conductance Fluctuations in Electrically Driven and Plasmonically Enhanced Molecular Junctions

[2307.06876] Light Emission and Conductance Fluctuations in Electrically Driven and Plasmonically Enhanced Molecular Junctions Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Condensed Matter > Mesoscale and Nanoscale Physics arXiv:2307.06876 (cond-mat) [Submitted on 13 Jul 2023 ( v1 ), last revised 28 Mar 2024 (this version, v2)] Title: Light Emission and Conductance Fluctuations in Electrically Driven and Plasmonically Enhanced Molecular Junctions Authors: Sakthi Priya Amirtharaj , Zhiyuan Xie , Josephine Si Yu See , Gabriele Rolleri , Wen Chen , Konstantin Malchow , Alexandre Bouhelier , Emanuel Lörtscher , Christophe Galland View a PDF of the paper titled Light Emission and Conductance Fluctuations in Electrically Driven and Plasmonically Enhanced Molecular Junctions, by Sakthi Priya Amirtharaj and 8 other authors View PDF HTML (experimental) Abstract: Electrically connected and plasmonically enhanced molecular junctions combine the optical functionalities of high field confinement and enhancement (cavity function), and of high radiative efficiency (antenna function) with the electrical functionalities of molecular transport. Such combined optical and electrical probes have proven useful for the fundamental understanding of metal-molecule contacts and contribute to the development of nanoscale optoelectronic devices including ultrafast electronics and nanosensors. Here, we employ a self-assembled metal-molecule-metal junction with a nanoparticle bridge to investigate correlated fluctuations in conductance and tunneling-induced light emission at room temperature. Despite the presence of hundreds of molecules in the junction, the electrical conductance and light emission are both highly sensitive to atomic-scale fluctuations -- a phenomenology reminiscent of picocavities observed in Raman scattering and of luminescence blinking from photo-excited plasmonic junctions. Discrete steps in conductance associated with fluctuating emission intensities through the multiple plasmonic modes of the junction are consistent with a finite number of randomly localized, point-like sources dominating the optoelectronic response. Contrasting with these microscopic fluctuations, the overall plasmonic and electronic functionalities of our devices feature long-term survival at room temperature and under an electrical bias of a few volts, allowing for measurements over several months. Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ; Optics (physics.optics) Cite as: arXiv:2307.06876 [cond-mat.mes-hall] (or arXiv:2307.06876v2 [cond-mat.mes-hall] for this version) https://doi.org/10.48550/arXiv.2307.06876 Focus to learn more arXiv-issued DOI via DataCite Journal reference: ACS Photonics (2024) 11, 6, 2388-2396 Related DOI : https://doi.org/10.1021/acsphotonics.4c00291 Focus to learn more DOI(s) linking to related resources Submission history From: Christophe Galland [ view email ] [v1] Thu, 13 Jul 2023 16:24:05 UTC (5,072 KB) [v2] Thu, 28 Mar 2024 14:59:34 UTC (12,138 KB) Full-text links: Access Paper: View a PDF of the paper titled Light Emission and Conductance Fluctuations in Electrically Driven and Plasmonically Enhanced Molecular Junctions, by Sakthi Priya Amirtharaj and 8 other authors View PDF HTML (experimental) TeX Source view license Current browse context: cond-mat.mes-hall < prev | next > new | recent | 2023-07 Change to browse by: cond-mat physics physics.optics References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... 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