Extracting Spectral Dynamics from Single Chromophores in Solution

Lisa F. Marshall, Jian Cui, Xavier Brokmann, and Moungi G. Bawendi
Phys. Rev. Lett. 105, 053005 – Published 29 July 2010

Abstract

Fluorescence spectroscopy of single chromophores immobilized on a substrate has provided much fundamental insight, yet the spectral line shapes and dynamics of single chromophores freely diffusing in solution have remained difficult or impossible to measure with conventional linear spectroscopies. Here, we demonstrate an interferometric technique for extracting time dependent single chromophore spectral correlations from intensity correlations in the interference pattern of an ensemble fluorescence spectrum. We apply our technique to solutions of colloidal quantum dots and explore the spectrum of single particles on short time scales not feasible with conventional fluorescence measurements.

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  • Received 25 March 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.053005

©2010 American Physical Society

Authors & Affiliations

Lisa F. Marshall, Jian Cui, Xavier Brokmann, and Moungi G. Bawendi*

  • Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

  • *mgb@mit.edu

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Vol. 105, Iss. 5 — 30 July 2010

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