Centre for Micro-Photonics

Nanophotonics

This project’s aim is to investigate the enhancement and localisation of light due to the plasmonic effect in nanoparticles of various geometries and material combinations. We have a particular focus on polarisation in hot spots. Polarisation is related to chemical activity at the interface.

These types of light field enhancements are important for electron transport through the interface in solar cells and photo-catalytic applications. Our investigation will lead to a better understanding of this area and the development of efficient solar cells.

Shows the absorption, scattering, and extinction spectra as well as localisation and enhancement of the normalised (to the incident) light field intensity shown in logarithmic scale; dashed lines are for the sphere without substrate. Arrow shows the spectral feature at which large enhancement (though weak scattering and absorption) is localised on the interface.

 

Figure: Shows the absorption, scattering, and extinction spectra as well as localisation and enhancement of the normalised (to the incident) light field intensity shown in logarithmic scale; dashed lines are for the sphere without substrate.

Arrow shows the spectral feature at which large enhancement (though weak scattering and absorption) is localised on the interface.