Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.

 

Effect of Disorder on Ultrafast Exciton Dynamics Probed by Single Molecule Spectroscopy

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Jordi Hernando, Erik M. H. P. van Dijk, Jacob P. Hoogenboom, Juan-José García-López, David N. Reinhoudt, Mercedes Crego-Calama, María F. García-Parajó, and Niek F. van Hulst
Physical Review Letters
vol. 97 issue 21 p216403 nov 20 2006

We present a single-molecule study unraveling the effect of static disorder on the vibrational-assisted ultrafast exciton dynamics in multichromophoric systems. For every single complex, we probe the initial exciton relaxation process by an ultrafast pump-probe approach and the coupling to vibrational modes by emission spectra, while fluorescence lifetime analysis measures the amount of static disorder. Exploiting the wide range of disorder found from complex to complex, we demonstrate that static disorder accelerates the dephasing and energy relaxation rate of the exciton.
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