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Lighting up long-range charge-transfer states by a localized plasmonic field
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology. University of Science and Technology of China.ORCID iD: 0000-0003-0007-0394
2017 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 9, no 46, 18189-18193 p.Article in journal (Refereed) Published
Abstract [en]

The long-range charge-transfer states in a donor-acceptor system exhibit well separated electron-hole pairs, but are often difficult to achieve by optical means owing to a very small overlap between the wave functions of the donor and acceptor. We have found that the introduction of a spatially confined plasmon can enhance the transition probability to the long-range charge-transfer states as it can effectively break the intrinsic symmetry selection rule imposed on the system. Meanwhile, the intensity borrowed from local excitations could also be selectively promoted, allowing the manipulation of the excited quantum states. In addition, our calculations reveal that the donor and acceptor moieties can be unambiguously visualized in real space by tip-enhanced resonance Raman images. These findings can benefit light-harvesting and also be readily extended to diverse optical processes.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2017. Vol. 9, no 46, 18189-18193 p.
National Category
Theoretical Chemistry Biological Sciences
Identifiers
URN: urn:nbn:se:kth:diva-220454DOI: 10.1039/c7nr06322aISI: 000416824100006Scopus ID: 2-s2.0-85036465256OAI: oai:DiVA.org:kth-220454DiVA: diva2:1170477
Funder
Swedish Research Council
Note

QC 20180103

Available from: 2018-01-03 Created: 2018-01-03 Last updated: 2018-01-03Bibliographically approved

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Luo, Yi

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