From Event: SPIE Organic Photonics + Electronics, 2016
Strong coupling of plasmons and excitons can form hybrid states, the so called “plexcitons”. Especially with molecular J-aggregated dye molecules strong interaction becomes observable even under ambient conditions. In our work we investigate the nature of plexcitonic states formed in gold nanorods coated with a cyanine dye by transient absorption spectroscopy. We demonstrate that plexcitons show tunable plasmonic and excitonic non-linear optical behaviour. Our experimental data can be explained on the basis of a simple Lorentz oscillator model. We find that both the quality factor and the coupling strength between plasmons and excitons can be optically manipulated on an ultrashort time scale.
T. Simon, D. Melnikau, A. Sánchez-Iglesias, M. Grzelczak, L. Liz-Marzán, Y. Rakovich, J. Feldmann and A. Urban, Exploring the optical non-linearities of plasmon-exciton hybrid resonances in coupled colloidal nanostructures, submitted (2016)
Thomas Simon, Dimitry Melnikau, Ana Sanchez-Iglesia, Marek Grzelczak, Luis M. Liz-Marzán, Yury P. Rakovich, Jochen Feldmann, and Alexander S. Urban, "Coupled plasmon-exciton hybrid excitations in colloidal gold nanorods coated with J-aggregated dye molecules
(Conference Presentation)," Proc. SPIE 9939, Light Manipulating Organic Materials and Devices III, 993906 (Presented at SPIE Organic Photonics + Electronics: August 31, 2016; Published: 3 November 2016); https://doi.org/10.1117/12.2236854.5167077720001.
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