Effective Electron Temperature Measurement Using Time-Resolved Anti-Stokes Photoluminescence
The Journal of Physical Chemistry A, vol. 124, pp. 6968–6976
Abstract
Abstract Anti-Stokes photoluminescence of metal nanoparticles, in which emitted photons have a higher energy than the incident photons, is an indicator of the temperature prevalent within a nanoparticle. Previous work has shown how to extract the temperature from a gold nanoparticle under continuous-wave monochromatic illumination. We extend the technique to pulsed illumination and introduce pump–probe anti-Stokes spectroscopy. This new technique enables us not only to measure an effective electron temperature in a gold nanoparticle (∼103 K under our conditions), but also to measure ultrafast dynamics of a pulse-excited electron population, through its effect on the photoluminescence, with subpicosecond time resolution. We measure the heating and cooling, all within picoseconds, of the electrons and find that, with our subpicosecond pulses, the highest apparent temperature is reached 0.6 ps before the maximum change in magnitude of the extinction signal.
Authors 4
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Affiliation as printed
Leiden University , , ,
Huygens−Kamerlingh Onnes Laboratory, Leiden University, Leiden, The Netherlands
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Delft University of Technology
Affiliation as printed
Delft University of Technology , , ,
Kavli Institute of Nanoscience Delft, Department of Bionanoscience, Delft University of Technology, Delft, The Netherlands
Kavli Institute of Nanoscience Delft, Department of Quantum Nanoscience, Delft University of Technology, Delft, The Netherlands
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Ben-Gurion University of the Negev
Affiliation as printed
Ben-Gurion University of the Negev , , ,
School of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Affiliation as printed
Leiden University , , ,
Huygens−Kamerlingh Onnes Laboratory, Leiden University, Leiden, The Netherlands
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