REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

Ultrasensitive nanoplasmonic CBRNe sensors using nanoparticle-based metamaterials

MARKO OBRADOV

IHTM – Centre of Microelectronic Technologies, University of Belgrade, Serbia marko.obradov@nanosys.ihtm.bg.ac.rs

ZORAN JAKŠIĆ

IHTM – Centre of Microelectronic Technologies, University of Belgrade, Serbia, jaksa@nanosys.ihtm.bg.ac.rs

DRAGAN TANASKOVIć

IHTM – Centre of Microelectronic Technologies, University of Belgrade, Serbia, dragant@nanosys.ihtm.bg.ac.rs

OLGA JAKŠIĆ

IHTM – Centre of Microelectronic Technologies, University of Belgrade, Serbia, olga@nanosys.ihtm.bg.ac.rs

DANA VASILJEVIĆ RADOVIĆ

IHTM – Centre of Microelectronic Technologies, University of Belgrade, Serbia, dana@nanosys.ihtm.bg.ac.rs

Abstract: Detection of dangerous substances is a primary concern of CBRNe (chemical, biological, radiological, nuclear and explosive) protection. Without fast and reliable means of detection of hazardous materials it becomes practically impossible to apply any other appropriate measures. Due to high toxicity and/or of substances in question it is of paramount importance to detect them even in the trace amounts. To this purpose the use of plasmonics has been shown to offer unparalleled enhancement of CBRNe sensors enabling the detection of dangerous substances in monatomic/monomolecular amounts. This is due to the extreme localization of plasmonic excitations on an interface between conductor and dielectric, making them highly sensitive to even a slightest change in the environment. In this paper we analyze a plasmonic sensor consisting of metal or dielectric conical nanoparticles with or without shell deposited on a metal substrate. By varying particle composition in this work we aim to combine the functionality of particles as scatterers and couplers with chemical activation of the metallic surface for highly sensitive CBRNe sensor. Finite elements method was used for numerical simulations of the electromagnetic properties of the proposed structures.

Keywords: plasmonic sensors, metamaterials, chemical sensing, CBRNe agents.