Ultrafast Studies of Hot-Hole Dynamics in Au/p-GaN Heterostructures

@article{Tagliabue2018UltrafastSO,
  title={Ultrafast Studies of Hot-Hole Dynamics in Au/p-GaN Heterostructures},
  author={Giulia Tagliabue and Joseph S. DuChene and Mohamed Abdellah and Adela Habib and Yocefu Hattori and Kaibo Zheng and Sophie E. Canton and David J. Gosztola and Wen-Hui Cheng and Ravishankar Sundararaman and Jacinto S{\'a} and Harry A. Atwater},
  journal={arXiv: Mesoscale and Nanoscale Physics},
  year={2018}
}
Harvesting non-equilibrium hot carriers from photo-excited metal nanoparticles has enabled plasmon-driven photochemical transformations and tunable photodetection with resonant nanoantennas. Despite numerous studies on the ultrafast dynamics of hot electrons, to date, the temporal evolution of hot holes in metal-semiconductor heterostructures remains unknown. An improved understanding of the carrier dynamics in hot-hole-driven systems is needed to help expand the scope of hot-carrier… Expand
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References

SHOWING 1-10 OF 34 REFERENCES
Quantification of Efficient Plasmonic Hot-Electron Injection in Gold Nanoparticle-TiO2 Films.
Excitation of localized surface plasmons in metal nanostructures generates hot electrons that can be transferred to an adjacent semiconductor, greatly enhancing the potential light-harvestingExpand
Quantifying the role of surface plasmon excitation and hot carrier transport in plasmonic devices
TLDR
The authors report internal quantum efficiency measurements in photoexcited gold gallium nitride Schottky diodes and elucidate the roles of surface plasmon excitation, hot carrier transport, and carrier injection in device performance, suggesting the possibility for hot carrier collection without substantial energy losses via thermalization. Expand
Anomalous ultrafast dynamics of hot plasmonic electrons in nanostructures with hot spots.
TLDR
General principles to enhance the generation of energetic electrons through specifically designed plasmonic nanostructures that could be used in applications where hot electron generation is beneficial, such as in solar photocatalysis, photodetectors and nonlinear devices are developed. Expand
Distinguishing between plasmon-induced and photoexcited carriers in a device geometry
TLDR
This work uses nanowire-based hot-carrier devices on a wide-bandgap semiconductor to show that plasmonic carrier generation is proportional to internal field-intensity enhancement and occurs independently of bulk absorption and that reducing the barrier height allows for the collection of carriers from plasmons and direct photoexcitation. Expand
Theoretical predictions for hot-carrier generation from surface plasmon decay
TLDR
It is found that carrier energy distributions are sensitive to the electronic band structure of the metal: gold and copper produce holes hotter than electrons by 1–2 eV, while silver and aluminium distribute energies more equitably between electrons and holes. Expand
Highly Stable Plasmon Induced Hot Hole Transfer into Silicon via a SrTiO3 Passivation Interface
Extracting plasmon-induced hot carriers over a metal-semiconductor Schottky barrier enables photodetection below the semiconductor bandgap energy. However, interfacial carrier recombination hindersExpand
Efficient hot-electron transfer by a plasmon-induced interfacial charge-transfer transition
TLDR
A pathway is proposed, called the plasmon-induced interfacial charge-transfer transition (PICTT), that enables the decay of a plAsmon by directly exciting an electron from the metal to a strongly coupled acceptor. Expand
Plasmon-induced hot carrier science and technology.
TLDR
Recent advances in the understanding and application of plasmon-induced hot carrier generation are discussed and some of the exciting new directions for the field are highlighted. Expand
Plasmonic coupling at a metal/semiconductor interface
Integrating plasmonic nanoparticles with semiconductor substrates introduces strong optical resonances that extend and enhance the spectrum of photocatalytic and photovoltaic activity. The effect ofExpand
Plasmon-induced hot electron transfer from the Au tip to CdS rod in CdS-Au nanoheterostructures.
TLDR
The plasmon-exciton interaction mechanisms in CdS-Au colloidal quantum-confined plexcitonic nanorod heterostructures have been studied by transient absorption spectroscopy and suggest the possibility of further optimization of plasMon-induced hot electron injection efficiency. Expand
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