Abstract
Metamaterials are artificially engineered structures that have unique properties not usually found in natural materials, such as negative refractive index. Conventional interferometry or ellipsometry is generally used for characterizing the optical properties of metamaterials. Here, we report an alternative optical vortex based interferometric approach for the characterization of the effective parameters of optical metamaterials by directly measuring the transmission and reflection phase shifts from metamaterials according to the rotation of vortex spiral interference pattern. The fishnet metamaterials possessing positive, zero and negative refractive indices are characterized with the vortex based interferometry to precisely determine the complex values of effective permittivity, permeability, and refractive index. Our results will pave the way for the advancement of new spectroscopic and interferometric techniques to characterize optical metamaterials, metasurfaces, and nanostructured thin films in general.
Recommended Citation
W. Cao et al., "Determination of Effective Parameters of Fishnet Metamaterials with Vortex based Interferometry," Optics Express, vol. 28, no. 14, pp. 20051 - 20061, Optical Society of America (OSA), Jul 2020.
The definitive version is available at https://doi.org/10.1364/OE.391873
Department(s)
Mechanical and Aerospace Engineering
International Standard Serial Number (ISSN)
1094-4087
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2020 Optical Society of America (OSA), All rights reserved.
Publication Date
06 Jul 2020
PubMed ID
32680072
Comments
National Science Foundation, Grant 1552871