Plasmonic Nanopore for Electrical Profiling of Optical Intensity Landscapes
2013 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 13, no 3, 1029-1033 p.Article in journal (Refereed) Published
We present a novel method for sensitive mapping of optical intensity distributions at subdiffraction-limited resolution. This is achieved with a novel device, a plasmonic nanopore, which combines a plasmonic bowtie nanoantenna with a 10 nm-in-diameter solid-state nanopore. Variations in the local optical intensity modulate the plasmonic heating, which we measure electrically through changes in the ionic conductance of the nanopore. We demonstrate the method by profiling the focal volume of a 10 mW laser beam that is tightly focused by a high-numerical-aperture microscope objective. The results show a complex three-dimensional intensity distribution that closely matches predictions obtained by theoretical calculations of the optical system. In addition to laser profiling, the ionic conductance of a nanopore is also shown to provide quantitative estimates of the temperature in the proximity of single plasmonic nanostructures.
Place, publisher, year, edition, pages
American Chemical Society , 2013. Vol. 13, no 3, 1029-1033 p.
Nanopore; optical nanoantenna; plasmonic heating; optical profiling; nanoplasmonics; thermoplasmonics
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:liu:diva-118819DOI: 10.1021/nl304213sISI: 000316243800026PubMedID: 23402575OAI: oai:DiVA.org:liu-118819DiVA: diva2:817154
Funding Agencies|Wenner-Gren Foundations; ERC project NANOforBIO2015-06-042015-06-042015-06-18