Plasmonic light-harvesting devices over the whole visible spectrum.
On the basis of conformal transformation, a general strategy is proposed to design plasmonic nanostructures capable of an efficient harvesting of light over a broadband spectrum. The surface plasmon modes propagate toward the singularity of these structures where the group velocity vanishes and energy accumulates. A considerable field enhancement and confinement is thus expected. Radiation losses are also investigated when the structure dimension becomes comparable to the wavelength.
Aubry
Alexandre
A
The Blackett Laboratory, Department of Physics, Imperial College London, London, UK. a.aubry@imperial.ac.uk
Lei
Dang Yuan
DY
Fernández-Domínguez
Antonio I
AI
Sonnefraud
Yannick
Y
Maier
Stefan A
SA
Pendry
J B
JB