Share Email Print

Proceedings Paper

Cloaking dielectric spheres by a shell of plasmonic and polaritonic nanoparticles
Author(s): Mohamed Farhat; Stefan Mühlig; Alastair Cunningham; Thomas Bürgi; Carsten Rockstuhl; Falk Lederer
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

This paper is dedicated to the study of plasmonic cloaking, based on the use of appropriate core-shell systems that may act as a cloaking devices for a finite range of frequencies. This cluster consists of an amorphous arrangement of metallic (gold or silver) and/or polaritonic nano-particles, which could be approximated in the quasistatic limit by an effective medium, having interesting properties such as a negative or very low permittivity and/or permeability in the optical domain with moderate losses. We first derive the effective properties of a shell made of such small spheres using the Maxwell-Garnett and Clausius-Mosotti formulas. We then numerically show that a dielectric core sphere is almost made invisible at optical frequencies with a scattering reduction of more than 70 percent. We finally derive some analytical expressions that we have compared to rigorous numerical simulations.

Paper Details

Date Published: 1 May 2012
PDF: 9 pages
Proc. SPIE 8423, Metamaterials VII, 84231D (1 May 2012); doi: 10.1117/12.922286
Show Author Affiliations
Mohamed Farhat, Friedrich-Schiller-Univ. Jena (Germany)
Stefan Mühlig, Friedrich-Schiller-Univ. Jena (Germany)
Alastair Cunningham, Univ. of Geneva (Switzerland)
Thomas Bürgi, Univ. of Geneva (Switzerland)
Carsten Rockstuhl, Friedrich-Schiller-Univ. Jena (Germany)
Falk Lederer, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 8423:
Metamaterials VII
Allan D. Boardman; Nigel P. Johnson; Richard W. Ziolkowski, Editor(s)

© SPIE. Terms of Use
Back to Top