Metamaterial-Based Sensor Design Working in Infrared Frequency Range

Abstract

Abstract-In this paper, we propose the design of high sensitivity and selectivity metamaterial-based biosensors operating in the THz regime. The proposed sensors consist of planar array of resonant metallic structures, whose frequency response is modified through the variation of the surrounding dielectric environment. We consider different resonator geometries, such as the squared, circular, asymmetrical, and omega ones, and the analysis of the biosensors is conducted through proper equivalent quasi-static analytical circuit models. The metallic particles are assumed deposited on a glass substrate through proper titanium adhesion layers. Exploiting the proposed analytical model, which is verified through the comparison to full-wave numerical simulations, we study the biosensor resonance frequencies as a function of the geometric parameters of the individual inclusions. Finally, we optimize the structure in order to obtain high sensitivity and selectivity performances. The numerical results show that the proposed structures can be successfully applied as biosensors working in the THz region.

Metamaterial-based sensor for hemoglobin measurements

“…In other words, the parallel capacitance connections of a classical circuit model [3], are replaced by a series combination of the geometrical inductances. In the following, we describe each of the terms.…”

“…To evaluate the quasi-static equivalent circuit model, reported in Figure 2(b), starting from the analytical model of the traditional square particle reported in [3], all the electric phenomena are replaced by the magnetic ones and vice versa. In other words, the parallel capacitance connections of a classical circuit model [3], are replaced by a series combination of the geometrical inductances.…”

“…For our purposes, in order to exploit such properties, it's suitable to arrange inclusions in an array configuration [3].…”

Terahertz Sensing Application by Using Fractal Geometries of Split-Ring Resonators

“…Since numerical and experimental studies of the first splitring-resonator-based MTM structure in the microwave region [1][2][3][4], this kind of structure has been used in many applications such as sensing [1,3,5], absorber [6][7][8], superlensing [9][10][11], and so on. With respect to sensing, MTMs have been proven to be good candidates in the THz regime for highly sensitive chemical or biological detection since the unit cell dimensions are typically sub-wavelength and frequency response can be tuned according to their shape and geometrical dimensions [12][13][14].…”

Electrothermally actuated microelectromechanical systems based omega-ring terahertz metamaterial with polarization dependent characteristics

“…[27][28][29][30][31] It can be quantitatively seen that as the Omega-ring bends towards the substrate, the gap between the metal and the substrate decreases. This increases the capacitance and hence the resonance frequency decreases.…”