The interplay between localized and propagating plasmonic excitations tracked in space and time.
basic_science · Level V
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- Record sourced from PubMed, PMID 24702430.
- Also identified by DOI 10.1021/nl500106z.
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Abstract
In this work, the mutual coupling and coherent interaction of propagating and localized surface plasmons within a model-type plasmonic assembly is experimentally demonstrated, imaged, and analyzed. Using interferometric time-resolved photoemission electron microscopy the interplay between ultrashort surface plasmon polariton wave packets and plasmonic nanoantennas is monitored on subfemtosecond time scales. The data reveal real-time insights into dispersion and localization of electromagnetic fields as governed by the elementary modes determining the functionality of plasmonic operation units.