Coherent Coupling of Molecular Excitons to Electronic Polarizations of Noble Metal Nanoparticles

详细信息    查看全文

• 作者：Gary P. Wiederrecht ; Gregory A. Wurtz ; and Jasmina Hranisavljevic
• 刊名：Nano Letters
• 出版年：2004
• 出版时间：November 2004
• 年：2004
• 卷：4
• 期：11
• 页码：2121 - 2125
• 全文大小：186K
• 年卷期：v.4,no.11(November 2004)
• ISSN：1530-6992

文摘

We report the observation of coherent polarization coupling between the exciton of a molecular J-aggregate and the electronic polarizationof noble metal nanoparticles. For Ag nanoparticles, coherent exciton coupling to the conduction band electrons leads to constructive interferenceand a long-lived exciton. For Au nanoparticles, the excitonic state interferes destructively with bound electron transition dipoles and theexciton lifetime is reduced by two orders of magnitude. Coherent polarization coupling in heterostructured nanomaterials may strongly impactthe functionality of future nanoelectronic and nanooptical materials.