arXiv subjects

Swadesh Poddar

Publications and source records attributed to Swadesh Poddar.

3 recordsLinked to original sources

arXiv2022

Computational Approach of Designing Magnetfree Nonreciprocal Metamaterial

This article aims at discussing computational approach to design magnet-free nonreciprocal metamaterial. Detailed mathematical derivation on floquet mode analysis is presented for Faraday and Kerr rotation. Non-reciprocity in the designed metasurface is achieved in the presence of biased transistor loaded in the gap of circular ring resonator. Based on the synthesized mathematical model, We extract co-cross polarized components as well as Faraday and Kerr rotation from the developed synthesized model and compare/contrast reciprocal and nonreciprocal system.

cs.CE↗

arXiv2022

Automatic Measurement Technique of Electromagnetic Rotation in a Nonreciprocal Medium

This article aims at developing a simple, automated test bench procedure to measure polarization rotation of an electromagnetic wave upon propagation through a nonreciprocal medium. A comprehensive measurement approach is developed from the scattering matrix. The proposed measurement procedure is demonstrated using an electronically tunable nonreciprocal metamaterial, and the accuracy of the proposed method is compared with the well-accepted conventional measurement technique.

physics.app-ph↗

arXiv2022

Analytical Modeling of Electromagnetic Rotation in Nonreciprocal Media

Reciprocity is a fundamental principle follows the time reversal symmetry of physics. However, many practical applications require breaking time reversal symmetry, hence, are called nonreciprocal. This article aims at discussing time reversal symmetry, developing fundamental building block to achieve nonreciprocity leading to robust analytical model to explain electromagnetic rotation upon propagation through nonreciprocal medium. Detailed mathematical derivation is presented for Faraday and Kerr rotation in the presence of external bias which breaks time reversal symmetry and leads to achieve nonreciprocal system. We validate our proposed model for conventional conditions and we compute the Faraday and Kerr rotation from a reported article using our proposed mathematical model and observed excellent agreement.

physics.app-ph↗