Designing an optimal dual-band metamaterial polarization converter for refractive index sensing

A system for designing an optimal dual-band metamaterial polarization converter, comprising:

• a memory storing instructions;
• one or more input/output (I/O) interfaces;
• and
• one or more hardware processors coupled to the memory via the one or more I/O interfaces, wherein the one or more hardware processors are configured by the instructions to:
• design a circular split-ring resonator (SRR) as a unit cell, having initial values of one or more key design parameters of the SRR, using a simulation model, wherein the SRR comprises a substrate layer sandwiched between a top layer and a bottom layer, and wherein the top layer comprises two capacitive gaps;
• align the two capacitive gaps of the top layer, at 180 degrees with respect to each other and at 45 degrees with respect to X-axis and Y-axis, to enable a cross-polarization conversion independent of a polarization direction of an incoming electromagnetic wave;
• and
• step-by-step tuning the initial values of the one or more key design parameters of the SRR, until an optimum frequency response is satisfied, to obtain the optimal dual-band metamaterial polarization converter with optimal values of the one or more key design parameters of the SRR.

One or more non-transitory machine-readable information storage mediums comprising one or more instructions which when executed by one or more hardware processors cause:

• designing, a circular split-ring resonator (SRR) as a unit cell, having initial values of one or more key design parameters of the SRR, using a simulation model, wherein the SRR comprises a substrate layer sandwiched between a top layer and a bottom layer, and wherein the top layer comprises two capacitive gaps;
• aligning, the two capacitive gaps of the top layer, at 180 degrees with respect to each other and at 45 degrees with respect to X-axis and Y-axis, to enable a cross-polarization conversion independent of a polarization direction of an incoming electromagnetic wave;
• step-by-step tuning, the initial values of the one or more key design parameters of the SRR, until an optimum frequency response is satisfied, to obtain the optimal dual-band metamaterial polarization converter with optimal values of the one or more key design parameters of the SRR;
• checking, a stability of the optimal dual-band metamaterial polarization converter using a parametric study, by varying the one or more key design parameters, within a predefined range;
• introducing, a target layer on the optimal dual-band metamaterial polarization converter, to calculate one or more sensing performance metrics from a shifted response, wherein the target layer comprises a plurality of samples with varying refractive index (RI) values;
• and
• validating, the shifted response of the optimal dual-band metamaterial polarization converter, using an equivalent circuit model of the optimal dual-band metamaterial polarization converter, based on the calculated one or more sensing performance metrics.