Electromagnetic parameter retrieval at oblique incidence

Khan, S.I., De La Rue, R.M. , Drysdale, T.D. and Johnson, N.P. (2013) Electromagnetic parameter retrieval at oblique incidence. In: Metamaterials VIII, Prague, Czech Republic, 17-18 Apr 2013, p. 877118. (doi: 10.1117/12.2017435)

Abstract

Optical metamaterials are able to achieve optical properties that do not exist in nature. Approaches to the homogenization of optical metamaterials are becoming more and more complex in the desire to achieve accurate representation. Here we propose to modify an existing retrieval approach for metamaterials to characterize their properties. To extract the effective refractive index and material parameters from reflection and transmission coefficients for double negative metamaterial in the optical regime, the modified Nicholson-Ross-Weir (NRW) method is used. In order to obtain a true picture of these metamaterials, as a function of angle of incidence of the illumination, it is important to present not only the effective parameters of permittivity and permeability but also some other important parameters such as coupling coefficients, that represent the inherent anisotropy.

• Item Type: Conference Proceedings
• Keywords: NRW method, metamaterials, S-parameters, refractive index, permittivity, permeability, effective material parameters, complex reflection coefficient, oblique incidence, homogenization.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Johnson, Dr Nigel and Drysdale, Dr Timothy and De La Rue, Professor Richard
• Authors: Khan, S.I., De La Rue, R.M., Drysdale, T.D., and Johnson, N.P.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISSN: 0277786X