Bi-anisotropy of multiple-layer fishnet negative-index metamaterials due to angled sidewalls

Bi-anisotropy of multiple-layer fishnet negative-index metamaterials due to angled sidewalls.

Simulation results of near infrared (100- to 200-THz) fishnet-structure negative-index metamaterials (NIMs) with single and multiple functional layers exhibit bi-anisotropy - inhomogeneous asymmetry - due to the presence of a sidewall-angle. The influence of sidewall-angle resulting from realistic fabrication processes is investigated through the retrieved effective parameters by both a three-d...

Theory of fishnet negative-index optical metamaterials.

We theoretically study fishnet metamaterials at optical frequencies. In contrast with earlier works, we provide a microscopic description by tracking the transversal and longitudinal flows of energy through the fishnet mesh composed of intersecting subwavelength plasmonic waveguides. The analysis is supported by a semianalytical model based on surface-plasmon coupled-mode equations, which provi...

Influence of the substrate on negative index fishnet metamaterials

Article history: Received 7 April 2010 Received in revised form 28 June 2010 Accepted 30 June 2010 We analyze numerically the influence of the dielectric substrate on the optical response and effective macroscopic parameters of fishnet metamaterials. We show that the substrate can suppress the region of the negative refractive index due to the weakening of the gap plasmon associated with the ma...

Enhanced Nonlinearities in Double-fishnet Negative-index Photonic Metamaterials

We numerically analyze the optical response and nonlinear susceptibilities of fishnet metamaterials with the holes infiltrated by a third-order nonlinear dielectric. Through full-wave simulations and employing a nonlinear parameter retrieval method, we confirm and quantify the enhanced nonlinearities, showing bulk third-order nonlinear susceptibilities that are up to two orders of magnitude lar...

Optical negative-index metamaterials