Special Issue "Polarization-Handling Metasurfaces"

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystal Engineering".

Deadline for manuscript submissions: 31 August 2020.

Special Issue Editor

Dr. Simone Zanotto
Website
Guest Editor
Istituto di Nanoscienze – CNR, and Laboratorio NEST, Scuola Normale Superiore, Pisa, Italy
Interests: symmetries and functionality in metasurfaces and metamaterials

Special Issue Information

Dear Colleagues,

I am pleased to announce this Special Issue devoted to the topic of Polarization Handling Metasurfaces.

The ability to generate, manipulate, and detect polarized radiation is a task of such importance that Nature itself learned how to do it—as the polarization vision capability of insects such as bees testifies. Mankind is however not lagging behind, learning to engineer structured materials that display unprecedented polarization handling capability. These objects, which come in the form of subwavelength or wavelength-scale thick patterned materials, are commonly named metasurfaces: according to the etymology, surfaces that go beyond (their individual constituents). Through judicious structuration, metasurfaces can accomplish tasks that ordinary materials cannot. This is particularly true for what concerns the polarization degree of freedom of light, since substances like solid-state crystals or liquid crystals show only limited values of linear and/or circular birefringence and diattenuation. Metasurfaces can also exploit resonance effects to operate in multiband fashion and can be arranged to display spatial phase-gradient phenomena or to implement computer-generated holograms. Other active fronts in the field are the search for specific target operations by inverse-design techniques and the investigation of reconfigurable and tunable metasurfaces.  

The aim of the present Issue is to collect novel results concerning this exciting field that lies at the crossing point among classical electromagnetism, physics of structured materials, radiofrequency technology, nanoscience, and photonics. Articles based on experimental, analytical, and numerical data will be considered and subject to rigorous peer-review before undergoing an editorial decision.

Dr. Simone Zanotto
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Birefringence
  • Dichroism, diattenuation
  • Chirality
  • Anisotropy, bianisotropy
  • Faraday and Kerr effects, nonreciprocity
  • Reconfiguration, tunability
  • Inverse design

Published Papers (1 paper)

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Research

Open AccessArticle
Biomedical Sensing with Free-Standing Complementary Supercell Terahertz Metasurfaces
Crystals 2020, 10(5), 372; https://doi.org/10.3390/cryst10050372 - 06 May 2020
Abstract
We present a free-standing terahertz metasurface supercell that consists of four complementary mirrored asymmetric split-rectangular resonators. The quality factor of the excited resonance of this supercell has been significantly improved by 250% when compared to its counterpart nonmirrored supercell. The mirroring of the [...] Read more.
We present a free-standing terahertz metasurface supercell that consists of four complementary mirrored asymmetric split-rectangular resonators. The quality factor of the excited resonance of this supercell has been significantly improved by 250% when compared to its counterpart nonmirrored supercell. The mirroring of the resonators leads to an enhanced out-of-phase oscillating current in each neighboring resonators of the supercell. In turn, this leads to a suppression of the dipole moments and its corresponding scattered fields. Moreover, this design can be realized by utilizing a simple laser machining technique. Furthermore, we numerically evaluate the performance of this design as a label-free biosensor for thin-film analytes and biomolecules such as double-stranded DNA and single-stranded RNA viruses. A sensitivity level of 1.14 × 105 nm/refractive index unit (RIU) can be achieved using this design. Therefore, this design has the potential to be used as an effective label-free biomedical sensor for in-situ detection of various biomolecules. Full article
(This article belongs to the Special Issue Polarization-Handling Metasurfaces)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title 1: Polarization control with helical metasurfaces

Abstract 1: The ability to fully control the polarization of light using chiral metadevices has drawn considerable attention in various applications of integrated photonics, communication systems, and life sciences. In this work, we propose a theoretical approach for the synthesis of metasurfaces with desired polarization properties for reflected and transmitted waves based on the proper spatial arrangement of chiral inclusions in the unit cell. Polarization conversion is achieved by engineering electric, magnetic and electromagnetic coupling of the metasurface inclusions. We show that under a proper arrangement, the same inclusion can be used as a building block of metasurfaces with drastically different wave-transformation functionalities. A smooth metallic helix was used as a simplest chiral inclusion, which can be manufactured by the established fabrication techniques from microwaves up to the visible spectral range. The proposed synthesis of devices
provides a deep understanding of the light-matter interaction for polarization conversions with chiral-based structures and opens the way to new possibilities of electromagnetic polarization control with advanced chiral metadevices in communication and imaging systems.


Title 2: Polarimetry in geometrical phase optical components: measuring geometric phase without interferometry

Authors: Oriol Arteaga, Hana Bendada

Abstract 2: Optical components based on Pancharatman-Berry phase feature a polarization-dependent diffraction that can be used to fabricate lenses and gratings with unique properties. In recent years, the great progress made in the fabrication of the metasurfaces required for these optical components has lowered their cost and has made them widely available. One of the often overlooked properties of optical components based on geometrical phases (GPs) is that, contrary to dynamical phases, their phase can be measured using a polarimetric technique without need to resorting to interferometry methods. This is possible because the Pancharatnam-Berry phase is not controlled by an optical path difference; it results from a space variant polarization manipulation. In this work we apply Mueller matrix microscopy to measure the geometrical phase of GP lenses and polarization gratings. We show that a single space resolved Mueller matrix measurement with micrometric resolution is enough to obtain a full characterization phase-profile of these GP-based optical components and evaluate their performance.

Title 3: Design of Ultrawideband Polarization Conversion Metasurface for Radar Cross Section Reduction of Circluary Polarized Antenna

Abstract 3: In the proposed work, a linear to linear ultrawideband polarization conversion metasurface (PCM) with high polarization conversion ratio (PCR) is designed for radar cross-section (RCS) reduction of antennas. The proposed PCM unit cell is composed of a metallic pattern designed on the top of the substrate and the bottom of the substrate is covered with metallic ground. The proposed PCM is a checkerboard combination of an array of PCM and its mirror unit cell. The proposed PCM effectively converts the x-polarized waves into the y-polarized waves after reflection with the PCR value more than 90% in ultrawideband. This property of PCM is effectively utilized to reduce the in-band and out-band RCS of the antenna. A circularly polarized antenna is chosen as the reference antenna and the proposed PCM is loaded on the reference antenna to design the proposed antenna. Further, the monostatic and bistatic RCS of the proposed antenna is decreased in ultrawideband as compared to the reference antenna without degrading the radiation performance of the proposed antenna. The prototype of both the antennas are fabricated and measured results are in congruence with the simulated results.

 
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