Optical Scattering Cancellation through Arrays of Plasmonic Nanoparticles: A Review

Photonics

Alessio Monti¹  Andrea Alù³  Alessandro Toscano² 

[1] Niccolò Cusano University, Via Don Carlo Gnocchi 3, Rome 00166, Italy;Department of Engineering, “Roma Tre” University, Via Vito Volterra 62, Rome 00154, Italy; E-Mails:;Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA; E-Mail:

关键词: optical mantle cloaking;    scattering cancellation;    optical metasurfaces;   

DOI  :  10.3390/photonics2020540

来源: mdpi

【 摘 要 】

In this contribution, we review and discuss our recent results on the design of optical scattering cancellation devices based on an array of plasmonic nanoparticles. Starting from two different analytical models available to describe its electromagnetic behavior, we show that a properly designed array of plasmonic nanoparticles behaves both as an epsilon-near-zero metamaterial and as a reactive metasurface and, therefore, can be successfully used to reduce the optical scattering of a subwavelength object. Three different typologies of nanoparticle arrays are analyzed: spherical, core-shell, and ellipsoidal nanoparticles. We prove, both theoretically and through full-wave simulations, that such nanostructures can be successfully used as a cloaking device at ultraviolet and optical frequencies.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.