The Physics of Unbounded, Broadband Absorption/Gain Efficiency in Plasmonic Nanoparticles
arXiv:1211.3797 · doi:10.1103/PhysRevB.87.205418
Abstract
Anomalous resonances in properly shaped plasmonic nanostructures can in principle lead to infinite absorption/gain efficiencies over broad bandwidths. By developing a closed-form analytical solution for the fields scattered by conjoined semicircles, we outline the fundamental physics behind these phenomena, associated with broadband adiabatic focusing of surface plasmons at the nanoscale. We are able to justify the apparent paradox of finite absorption/gain in the limit of infinitesimally small material loss/gain, and we explore the potential of these phenomena in nonlinear optics, spasing, energy-harvesting and sensing.
19 pages, 7figures
References in corpus (5)
- Theory of Supercoupling, Squeezing Wave Energy, and Field Confinement in Narrow Channels and Tight Bends Using Epsilon-Near-Zero Metamaterials
- Spaser Action, Loss Compensation, and Stability in Plasmonic Systems with Gain
- Spectral super-resolution in metamaterial composites
- Parallel, Series, and Intermediate Interconnections of Optical Nanocircuit Elements Part 1: Analytical Solution
- Dipole Response of Spaser on an External Optical Wave