Simplified model for periodic nanoantennae: linear model and inverse design

Joshua Borneman, Purdue University - Main Campus
Kuo-Ping Chen, Purdue University - Main Campus
Alexander V. Kildishev, Birck Nanotechnology Center, School of ECE
V. M. Shalaev, Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University

Abstract

We determine and use a minimal set of numerical simulations to create a simplified model for the spectral response of nanoantennae with respect to their geometric and modeling parameters. The simplified model is then used to rapidly obtain best-fit modeling parameters to match experimental results, accurately predict the spectral response for various geometries, and inversely design antennae to have a desired performance. This method is structure and model independent, and is applied here to both nanoantenna pair arrays and strips modeled using a 3D finite-element method and 2D spatial harmonic analysis, respectively. Typical numerical simulations may need hours per model, whereas this method, after the initial time to obtain a baseline set of simulations, requires only seconds to analyze and generate spectra for new geometries.

Discipline(s)

Engineering | Nanoscience and Nanotechnology