Photoinduced force mapping of plasmonic nanostructures
| dc.citation.journalTitle | Nano Letters | en_US |
| dc.contributor.author | Tumkur, Thejaswi U. | en_US |
| dc.contributor.author | Yang, Xiao | en_US |
| dc.contributor.author | Cerjan, Benjamin | en_US |
| dc.contributor.author | Halas, Naomi J. | en_US |
| dc.contributor.author | Nordlander, Peter | en_US |
| dc.contributor.author | Thomann, Isabell | en_US |
| dc.contributor.org | Laboratory for Nanophotonics | en_US |
| dc.contributor.org | Rice Quantum Institute | en_US |
| dc.date.accessioned | 2016-11-22T15:16:06Z | en_US |
| dc.date.available | 2016-11-22T15:16:06Z | en_US |
| dc.date.issued | 2016 | en_US |
| dc.description | NEWS COVERAGE: A news release based on this journal publication is available online: http://news.rice.edu/2016/12/14/light-provides-pull-for-future-nanocatalyst-measurement/ | en_US |
| dc.description.abstract | The ability to image the optical near-fields of nanoscale structures, map their morphology and concurrently obtain spectroscopic information, all with high spatiotemporal resolution, is a highly sought-after technique in nanophotonics. As a step towards this goal, we demonstrate the mapping of electromagnetic forces between a nanoscale tip and an optically excited sample consisting of plasmonic nanostructures, with an imaging platform based on atomic force microscopy. We present the first detailed joint experimental-theoretical study of this type of photo-induced force microscopy. We show that the enhancement of near-field optical forces in gold disk dimers and nanorods follows the expected plasmonic field enhancements, with strong polarization sensitivity. We then introduce a new way to evaluate optically-induced tip-sample forces by simulating realistic geometries of the tip and sample. We decompose the calculated forces into in-plane and out-of-plane components and compare the calculated and measured force enhancements in the fabricated plasmonic structures. Finally, we show the usefulness of photo-induced force mapping for characterizing the heterogeneity of near-field enhancements in precisely e-beam fabricated nominally alike nanostructures - a capability of widespread interest for precise nanomanufacturing, SERS and photocatalysis applications. | en_US |
| dc.identifier.citation | Tumkur, Thejaswi U., Yang, Xiao, Cerjan, Benjamin, et al.. "Photoinduced force mapping of plasmonic nanostructures." <i>Nano Letters,</i> (2016) American Chemical Society: http://dx.doi.org/10.1021/acs.nanolett.6b04245. | en_US |
| dc.identifier.doi | http://dx.doi.org/10.1021/acs.nanolett.6b04245 | en_US |
| dc.identifier.uri | https://hdl.handle.net/1911/92710 | en_US |
| dc.language.iso | eng | en_US |
| dc.publisher | American Chemical Society | en_US |
| dc.rights | This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society. | en_US |
| dc.subject.keyword | plasmonics | en_US |
| dc.subject.keyword | near-field scanning optical microscopy | en_US |
| dc.subject.keyword | gradient force | en_US |
| dc.subject.keyword | photocatalysis | en_US |
| dc.subject.keyword | nanocharacterization | en_US |
| dc.title | Photoinduced force mapping of plasmonic nanostructures | en_US |
| dc.type | Journal article | en_US |
| dc.type.dcmi | Text | en_US |
| dc.type.publication | post-print | en_US |