## MEHWISH NISAR

PhD Graduate**PhD program:**: XXXIV

**advisor**: Fabrizio Frezza

**Thesis title:**Electrical Response of Basic Scatterers And Scattering from Biological Samples

This thesis mainly addresses two electromagnetic problems. In first part, the electrostatic response of a multi-layer and Radially Anisotropic (RA) sphere, cylinder and dielectric half-ellipse has been examined by computing polarizability of each shape. For multi-layer spherical and cylindrical shapes, permittivity components have different values in radial and tangential directions. For both shapes, transmission line method is presented for finding their polarizability and hence effective permittivity. Each of these are presented as a function of positive permittivity. It is also presented that there exist a certain relationship between radial and tangential permittivity components for each layer, for which both RA shapes can be used in cloaking isotropic object of any shape and with any permittivity value.
For dielectric half-elliptic object, two special cases are investigated: one series, the other parallel. Polarizability cannot be calculated purely analytically, hence a large matrix equation must be constructed and solved. The polarizability of a half-ellipse is presented as a function of relative permittivity. With positive values for permittivity, the results are quite accurate and they are verified by computing the polarizability numerically.
The second part, examines the polarisation-resolved imaging. This technique has been applied to isotropic (Teflon) reference sample and anisotropic (Wood) reference sample. Both samples are exposed to linearly polarized light and then based on radiance, we are able to distinguish two samples and recognize each sample by identifying its behavior. Later, we attempt to study the difference between wood (horizontal and vertical) and teflon samples using Mueller matrix polarimetry. We tend to find Mueller matrix coefficients using two approaches.

**Research products**

- 11573/1408426 - 2020 - Cloaking and magnifying using radial anisotropy in non-integer dimensional space (04b Atto di convegno in volume)

BATOOL, SIDRA; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1443739 - 2020 - The polarizability of an alternative sequence of isotropic and radially anisotropic multilayer sphere (04b Atto di convegno in volume)

BATOOL, SIDRA; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1443751 - 2020 - Characterization of microscopical anisotropy of biological tissues by polarization imaging (04b Atto di convegno in volume)

BATOOL, SIDRA; NISAR, MEHWISH; FREZZA, FABRIZIO; MANGINI, FABIO; FAZIO, EUGENIO - 11573/1443743 - 2020 - Finding the polarizability of radially anisotropic multilayer circular cylinder (04b Atto di convegno in volume)

BATOOL, SIDRA; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1443734 - 2020 - Electromagnetic interaction with a monodispersed system in sedimentation equilibrium (04b Atto di convegno in volume)

BATOOL, SIDRA; DINIA, LORENZO; FREZZA, FABRIZIO; MANGINI, FABIO; NISAR, MEHWISH - 11573/1443737 - 2020 - Elliptically inhomogeneous plane wave impinging on an infinite number of parallel cylinders (04b Atto di convegno in volume)

BATOOL, SIDRA; DINIA, LORENZO; FREZZA, FABRIZIO; MANGINI, FABIO; NISAR, MEHWISH - 11573/1443717 - 2020 - Cloaking using the anisotropic multilayer sphere (01a Articolo in rivista)

BATOOL, SIDRA; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1443730 - 2020 - Polarization imaging for identifying the microscopical orientation of biological structures (04b Atto di convegno in volume)

BATOOL, SIDRA; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO; FAZIO, EUGENIO - 11573/1443721 - 2020 - Cloaking using anisotropic multilayer circular cylinder (01a Articolo in rivista)

BATOOL, SIDRA; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1620504 - 2021 - Absorption and invisibility of a Transparent Radial Anisotropy (TRA) cylinder (04b Atto di convegno in volume)

NISAR, MEHWISH; BATOOL, SIDRA; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1620486 - 2021 - Polarizability of dielectricprolate half ellipse (04b Atto di convegno in volume)

NISAR, MEHWISH; BATOOL, SIDRA; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1620600 - 2021 - Mueller matrix polarimetry for differentiating characteristic features of different materials (wood, shinning steel, unpolished plastic) (04b Atto di convegno in volume)

NISAR, MEHWISH; BATOOL, SIDRA; MANGINI, FABIO; FAZIO, EUGENIO; FREZZA, FABRIZIO - 11573/1620559 - 2021 - Interpreting Mueller matrix of anisotropic material (04b Atto di convegno in volume)

NISAR, MEHWISH; BATOOL, SIDRA; MANGINI, FABIO; FREZZA, FABRIZIO; FAZIO, EUGENIO - 11573/1620606 - 2021 - Scattering of an inhomogeneous wave impinging on parallel stratified cylinders (04b Atto di convegno in volume)

NISAR, MEHWISH; BATOOL, SIDRA; DINIA, LORENZO; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1620611 - 2021 - Multiple scattering by two PEC sphere (04b Atto di convegno in volume)

NISAR, MEHWISH; BATOOL, SIDRA; MANGINI, FABIO; FAZIO, EUGENIO; FREZZA, FABRIZIO - 11573/1620624 - 2022 - Recognition of bio-structural anisotropy by polarization resolved imaging (01a Articolo in rivista)

FAZIO, EUGENIO; BATOOL, SIDRA; NISAR, MEHWISH; ALONZO, MASSIMO; FREZZA, FABRIZIO - 11573/1621798 - 2021 - Multiple scattering by two PEC spheres using translation addition theorem (01a Articolo in rivista)

BATOOL, SIDRA; NISAR, MEHWISH; DINIA, LORENZO; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1653174 - 2020 - Scattering of Light from the Systemic Circulatory System (01a Articolo in rivista)

SIDRA, BATOOL; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO; FAZIO, EUGENIO - 11573/1653176 - 2020 - Erratum: “Cloaking using anisotropic multilayer circular cylinder” [AIP Adv. 10, 095312 (2020)] (01b Commento, Erratum, Replica e simili)

SIDRA, BATOOL; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO - 11573/1618791 - 2021 - To study the Mueller matrix polarimetry for the characterization of wood and Teflon flat samples (01a Articolo in rivista)

SIDRA, BATOOL; NISAR, MEHWISH; MANGINI, FABIO; FREZZA, FABRIZIO; FAZIO, EUGENIO