Coherent Control of the Optical Emission in a Single Organic Quantum Wire

We report on the first coherent control experiments on a purely electronic exciton state in an extended quasi-perfect organic quantum wire, a polydiacetylene chain isolated in the crystalline matrix of its own monomer. The time-integrated luminescence of a single wire is measured as the relative pha...

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Bibliographic Details
Published in:Nano letters 2011-10, Vol.11 (10), p.4496-4502
Main Authors: Holcman, Jeremy, Al Choueiry, Antoine, Enderlin, Alexandre, Hameau, Sophie, Barisien, Thierry, Legrand, Laurent
Format: Article
Language:English
Subjects:
Chains
Coherence
Condensed Matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Electron states
Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronics
Exact sciences and technology
Excitation
Excitons and related phenomena
Imaging
Materials science
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Physics
Quantum wires
Single wires
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Summary:We report on the first coherent control experiments on a purely electronic exciton state in an extended quasi-perfect organic quantum wire, a polydiacetylene chain isolated in the crystalline matrix of its own monomer. The time-integrated luminescence of a single wire is measured as the relative phase between two exciting sub-picosecond laser pulses is varied. From visibility functions the exciton dephasing time is extracted and its temperature dependence studied. Our work points the predominant role of thermalization upon the phase relaxation dynamics. By means of microscopic imaging spectroscopy we also show that despite local excitation coherent control is achieved on states delocalized over the chain at the micrometric scale.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl2031822