TY - JOUR
T1 - Effective Electron Temperature Measurement Using Time-Resolved Anti-Stokes Photoluminescence
AU - Jollans, Thomas
AU - Caldarola, Martín
AU - Sivan, Yonatan
AU - Orrit, Michel
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85090078133&partnerID=8YFLogxK
U2 - 10.1021/acs.jpca.0c06671
DO - 10.1021/acs.jpca.0c06671
M3 - Article
C2 - 32787000
SN - 1520-5215
VL - 124
SP - 6968
EP - 6976
JO - The journal of physical chemistry. A
JF - The journal of physical chemistry. A
IS - 34
ER -