Abstract

The plasmonic resonances of metamaterials based on Au nanorod arrays give rise to high field enhancement combined with strong field localisation which can be controlled by nanoscale geometrical effects within the nanorod array. These have led to extraordinary refractive index sensitivity, enhanced nonlinear optical effects and enhanced spontaneous emission rate near and inside the metamaterial [1-4]. Additional flexibility in engineering the spectrum, magnitude and spatial distribution of the field enhancement can be achieved with more complex nanostructures replacing the cylindrical nanorods in the metamaterial with nanocones.

© 2017 IEEE