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.

 

Ultrafast single-molecule photonics: Excited state dynamics in coherently coupled complexes

(full pdf)

Jordi Hernando, Jacob Hoogenboom, Erik van Dijk, Maria Garcia-Parajo, Niek F. van Hulst
Journal of Luminescence
vol 128 issue 5-6 p1050–1052 jan 2 2008
doi:10.1016/j.jlumin.2007.11.027

We present a single-molecule study on femtosecond dynamics in multichromophoric systems, combining fs pump–probe, emissionspectra and fluorescence-lifetime analysis. The ultrafast fs approach gives direct information on the initial exciton dynamics after excitation. The lifetime data show superradiance, a direct measure for the extent of the coherent coupling and static disorder. The spectra finally reveal the role of exciton–phonon coupling. At the single-molecule level a wide range of exciton delocalization lengths and energy redistribution times is revealed.
© 2007 Elsevier B.V. All rights reserved.
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