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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Nonlinear optical response and ultrafast dynamics in C60.

G P Zhang1, X Sun, Thomas F George

  • 1Department of Physics, Indiana State University, Terre Haute, Indiana 47809, USA. gpzhang@indstate.edu

The Journal of Physical Chemistry. A
|January 28, 2009
PubMed
Summary

Fullerenes like C(60) exhibit complex nonlinear optical and ultrafast dynamics. Investigations reveal insights into electron and nuclear motion, charge transfer, and photoexcitation processes, crucial for nanoscience applications.

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Area of Science:

  • Nanoscience
  • Physical Chemistry
  • Materials Science

Background:

  • Buckminsterfullerene (C(60)) is a pivotal molecule in nanoscience.
  • Its nonlinear optical properties and ultrafast dynamics are key to understanding its broader impact.

Purpose of the Study:

  • To review current experimental and theoretical investigations of C(60)'s nonlinear optical response.
  • To explore ultrafast electron and nuclear dynamics, charge transfer, and photoexcitation in C(60).

Main Methods:

  • Nonlinear optical spectroscopy, including harmonic generation and two-photon absorption.
  • Femtosecond and picosecond degenerate and nondegenerate four-wave mixing.
  • Pump-probe spectroscopy and time-resolved photoemission spectroscopy.

Main Results:

  • Theoretical models predict longer relaxation times for charge transfer than photoexcitation.
  • Analysis reveals reasons for normal mode excitations and changes in electron density of states.
  • Time-resolved spectroscopy can probe electron correlation effects and resolve pulse duration dependencies.

Conclusions:

  • Theoretical and experimental studies are essential for understanding C(60)'s complex dynamics.
  • Further research into high-harmonic generation and ultrafast processes offers insights into electron correlation.
  • Prospects for C(60) include advanced applications in optics and materials science.