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Plasmon-Coupled Resonance Energy Transfer.

Liang-Yan Hsu1, Wendu Ding1, George C Schatz1

  • 1Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States.

The Journal of Physical Chemistry Letters
|May 4, 2017
PubMed
Summary
This summary is machine-generated.

We developed a theory for plasmon-coupled resonance energy transfer (PC-RET) between molecules near plasmonic structures. This theory provides a generalized spectral overlap to predict energy transfer rates, crucial for nanophotonics and biosensing applications.

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Area of Science:

  • Physical Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Resonance energy transfer (RET) is fundamental to molecular interactions.
  • Plasmonic structures significantly influence energy transfer dynamics.
  • Existing theories often lack generality for complex dielectric environments.

Purpose of the Study:

  • To derive a general Förster-type expression for plasmon-coupled resonance energy transfer (PC-RET).
  • To introduce the concept of generalized spectral overlap (GSO) for understanding PC-RET wavelength dependence.
  • To provide a theoretical framework for optimizing PC-RET in nanostructured systems.

Main Methods:

  • Derivation of a generalized Förster-type expression for PC-RET rate.
  • Development of the generalized spectral overlap (GSO) parameter.
  • Simulations of GSO to analyze spectral dependencies of PC-RET.

Main Results:

  • An explicit expression for PC-RET rate: WET = (8.785 × 10⁻²⁵ mol) φDτD⁻¹J̃.
  • The GSO (J̃) accounts for molecular properties and plasmon coupling.
  • PC-RET's optimal spectral region may differ from plasmon extinction maxima.

Conclusions:

  • The developed theory offers a versatile approach to PC-RET.
  • GSO provides insights into wavelength-dependent energy transfer in plasmonic systems.
  • This work advances understanding of exciton transport in nanostructures for applications in spectroscopy, photonics, biosensing, and energy devices.