Negative Refractive Index Metasurfaces for Enhanced Biosensing

Materials

Zoran Jakšić²  Slobodan Vuković¹  Jovan Matovic³ 

[1] Institute of Physics, University of Belgrade, 11080 Zemun, Serbia; E-Mail:;Center of Microelectronic Technologies and Single Crystals (CMTM), Institute of Chemistry, Technology and Metallurgy (IHTM), University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia; E-Mail:;Institute for Sensor and Actuator Systems (ISAS), Faculty of Electrical Engineering & Information Technology, Vienna University of Technology, Gusshausstrasse 27-29/366-MST, A-1040 Vienna, Austria; E-Mail:

关键词: plasmonics;    optical metamaterials;    artificial nanomembranes;    long range surface plasmons polaritons;    chemical sensors;    biosensors;   

DOI  :  10.3390/ma4010001

来源: mdpi

【 摘 要 】

In this paper we review some metasurfaces with negative values of effective refractive index, as scaffolds for a new generation of surface plasmon polariton-based biological or chemical sensors. The electromagnetic properties of a metasurface may be tuned by its full immersion into analyte, or by the adsorption of a thin layer on it, both of which change its properties as a plasmonic guide. We consider various simple forms of plasmonic crystals suitable for this purpose. We start with the basic case of a freestanding, electromagnetically symmetrical plasmonic slab and analyze different ultrathin, multilayer structures, to finally consider some two-dimensional “wallpaper” geometries like split ring resonator arrays and fishnet structures. A part of the text is dedicated to the possibility of multifunctionalization where a metasurface structure is simultaneously utilized both for sensing and for selectivity enhancement. Finally we give an overview of surface-bound intrinsic electromagnetic noise phenomena that limits the ultimate performance of a metasurfaces sensor.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.