Driving plasmonic nanoantennas at perfect impedance matching using generalized coherent perfect absorption

Plasmonic nanoantennas as integrated coherent perfect absorbers on SOI waveguides for modulators and all-optical switches.

The performance of plasmonic nanoantenna structures on top of SOI wire waveguides as coherent perfect absorbers for modulators and all-optical switches is explored. The absorption, scattering, reflection and transmission spectra of gold and aluminum nanoantenna-loaded waveguides were calculated by means of 3D finite-difference time-domain simulations for single waves propagating along the waveg...

Beam steering and impedance matching of plasmonic horn nanoantennas.

In this paper, we study a plasmonic horn nanoantenna on a metal-backed substrate. The horn nanoantenna structure consists of a two-wire transmission line (TWTL) flared at the end. We analyze the effect of the substrate thickness on the nanoantenna's radiation pattern, and demonstrate beam steering in a broad range of elevation angles. Furthermore, we analyze the effect of the ground plane on th...

Critical route for coherent perfect absorption in a Fano resonance plasmonic system

All-optical multichannel logic based on coherent perfect absorption in a plasmonic metamaterial

1 Optoelectronics Research Centre & Centre for Photonic Metamaterials, University of Southampton, Highfield, Southampton, SO17 1BJ, UK 2 Institute for Life Sciences, University of Southampton, Highfield, Southampton, SO17 1BJ, UK 3 Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences and The Photonics Institute, Nanyang Technological University, Singapore 63...

Coherent control of plasmonic nanoantennas using optical eigenmodes

The last decade has seen subwavelength focusing of the electromagnetic field in the proximity of nanoplasmonic structures with various designs. However, a shared issue is the spatial confinement of the field, which is mostly inflexible and limited to fixed locations determined by the geometry of the nanostructures, which hampers many applications. Here, we coherently address numerically and exp...