Related Experiment Video
Updated: Jun 5, 2025
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
14.8K
Hot carrier generation in a strongly coupled molecule-plasmonic nanoparticle system
Katarzyna Kluczyk-Korch1, Tomasz J Antosiewicz1
1Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland.
Nanophotonics (Berlin, Germany)
|December 5, 2024
Summary
Strongly coupled light-matter systems create new pathways for plasmon decay into hot carriers. This interaction allows manipulation of hot carrier energy distribution and enables charge transfer between nanoparticles and molecules.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Physical Chemistry
Background:
- Strong light-matter coupling links electronic energy levels to electromagnetic fields.
- This hybridization creates new relaxation pathways, crucial for plasmon decay into hot carriers.
Purpose of the Study:
- Investigate how coupling strength influences hot carrier generation in plasmonic-molecule systems.
- Understand the impact of hybridization on electronic structure and energy distribution.
Main Methods:
- First principles calculations.
- Atomistic approach to model electronic structure changes.
- Analysis of plasmon decay and hot carrier generation dynamics.
Main Results:
- Hot carriers are preferentially generated at frequencies matching polaritonic resonances.
- Energy distribution of hot carriers significantly deviates from non-interacting systems.
- Observed direct electron transfer between plasmonic nanoparticles and molecules.
Conclusions:
- Hybridized nanoparticle-molecule states introduce new plasmon decay pathways.
- Strong coupling enables manipulation of hot carrier energy distribution.
- Facilitates charge transfer, opening possibilities for novel optoelectronic devices.
Related Concept Videos
01:22Carrier Generation and Recombination
517
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
517
01:27¹H NMR: Long-Range Coupling
1.7K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
1.7K