What is it about?
Luminescence from gold was discovered about 50 years ago. However, the quantum efficiency is very low and rarely studied as a main subject in the field of optical spectroscopy. Here, we present first comprehensive work on luminescence in gold with a femtosecond time-resolved spectroscopy.
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Why is it important?
We show the instantaneous intensity is comparable to that from semiconductors, using femtosecond time-resolved spectroscopy. The time evolution of the luminescence spectra in subpicosecond region is well understood in terms of a model considering non-thermalized and thermal electron distributions. It is shown that luminescence is a powerful tool to investigate hot electron dynamics in metals. Luminescence from nanostructured metals is an important issue in relation with tracers and imagers in biomedical applications. Our work in bulk gold can be a basis of understanding luminescence phenomena in nanostructures.
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This page is a summary of: Observation of femtosecond infrared luminescence in gold, September 2019, American Physical Society (APS),
DOI: 10.1103/physrevb.100.125405.
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