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Frontiers in Optical Materials
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Frontiers in Optical Materials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (20 January 2023) | Viewed by 8080

Special Issue Editors

Prof. Dr. Jun-Jun Xiao

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Guest Editor
College of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Xili, Shenzhen 518055, China
Interests: nanophotonics; metamaterial; machine learning for light and with light; intelligent optical information processing
Dr. Qiang Zhang

E-Mail
Guest Editor
Department of Physics and Optoelectronics and Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education, Taiyuan University of Technology, Yingze West Street 79, Taiyuan 030024, China
Interests: functional optical metasurfaces; quantum and molecular plasmonics; plasmon-enhanced spectroscopies; all-dielectric nanoresonators; topological nanophotonics
Dr. Zhenzhen Liu

E-Mail
Guest Editor
College of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen Research building L1312, HIT Campus of University Town of Shenzhen, Shenzhen 518055, China
Interests: non-Hermitian photonics; topological photonics; metamaterial

Special Issue Information

Dear Colleagues,

Artificially engineered optical metamaterials have emerged with properties and functionalities previously unattainable in natural materials. Particularly, as a 2D form of metamaterials, optical metasurfaces exhibit a powerful capability in terms of manipulating the behaviors of light in a significantly flexible way. Due to these virtues, optical metamaterials promise applications in planar meta-lens, polarization conversion plates, topological optical devices, optical holograms, displaying and imaging, etc. The scientific breakthroughs made in this new class of electromagnetic materials are closely linked to progress in developing physics-driven design, full-wave simulations combining advanced machine learning, and novel parallel fabrication methods. We expect this Special Issue to gather cutting-edge research and recent works on the topics related to this field, including but not limited to optical metasurfaces and/or stereo-metamaterials with useful functions, dynamically tunable metamaterials, advanced design methods and concepts of metamaterials, as well as interesting physics on light–matter interactions in all dielectric and plasmonic metamaterials. Hopefully, the collections in this Special Issue will contribute to the development of this field and accelerate the pace of optical metamaterials towards a wide range of practical applications.

Prof. Dr. Jun-Jun Xiao
Dr. Qiang Zhang
Dr. Zhenzhen Liu
Guest Editors

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 submissions that pass pre-check are 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.

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 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

  • optical metamaterials
  • metasurfaces
  • machine learning
  • dielectric
  • plasmonic
  • topological
  • dynamically tunable
  • holograms

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Published Papers (3 papers)

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Research

21 pages, 3620 KiB  
Article
Design of Two-Mode Spectroscopic Sensor for Biomedical Applications: Analysis and Measurement of Relative Intensity Noise through Control Mechanism
by Usman Masud, Muhammad Rizwan Amirzada, Hassan Elahi, Faraz Akram, Ahmed Zeeshan, Yousuf Khan, Muhammad Khurram Ehsan, Muhammad Aasim Qureshi, Aasim Ali, Sajid Nawaz and Usman Ghafoor
Appl. Sci. 2022, 12(4), 1856; https://doi.org/10.3390/app12041856 - 11 Feb 2022
Cited by 5 | Viewed by 2654
Abstract
The design of an intracavity spectroscopy based two-mode biomedical sensor involves a thorough investigation of the system. For this purpose, the individual components that are present in the system must be examined. This work describes the principle of two very important gadgets, namely [...] Read more.
The design of an intracavity spectroscopy based two-mode biomedical sensor involves a thorough investigation of the system. For this purpose, the individual components that are present in the system must be examined. This work describes the principle of two very important gadgets, namely the Fibre Bragg Grating (FBG), and the tunable coupler. We adhere to a Petri network scheme to model and analyze the performance of the FBG, and the results mirror strikingly low difference in the values of Bragg Wavelength during its ascending and descending operational principle, thereby maintaining the accuracy of the sensor’s results. Next, a pseudocode is developed and implemented for the investigation of the optical coupler in LabView. The values of its maximum output power are determined, and the coupling ratio for various values of controlling voltage is determined at three different wavelengths. The hysteresis results mirror an extremely low difference between the forward and reverse values in the results. Both the results of the FBG and the coupler are thereby extremely reliable to use them in the laser system, as evident from the respective intensity noise outcomes, as well as the experimentation on substances of interest (Dichloro Methane and Propofol). Full article
(This article belongs to the Special Issue Frontiers in Optical Materials)
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13 pages, 2375 KiB  
Article
Reaction Center of Rhodobacter Sphaeroides, a Photoactive Protein for pH Sensing: A Theoretical Investigation of Charge Transport Properties
by Eleonora Alfinito and Lino Reggiani
Appl. Sci. 2022, 12(3), 1738; https://doi.org/10.3390/app12031738 - 8 Feb 2022
Viewed by 1558
Abstract
In the perspective of an increasing attention to ecological aspects of science and technology, it is of interest to design devices based on architectures of modular, low cost, and low-pollutant elements, each of them able to perform simple duties. Elemental devices may be [...] Read more.
In the perspective of an increasing attention to ecological aspects of science and technology, it is of interest to design devices based on architectures of modular, low cost, and low-pollutant elements, each of them able to perform simple duties. Elemental devices may be themselves green as, for example, proteins able to make simple actions, like sensing. To this aim, photosensitive proteins are often considered because of the possibility of transferring their specific reaction to visible light into electronic signals. Here, we investigate the expected electrical response of the photoactive protein Reaction Center (bRC) of Rhodobacter Sphaeroides within the proteotronics, a recent branch of molecular electronics that evaluates the electrical properties of a protein by using an impedance network protein analog based on the protein tertiary structure and the degree of electrical connectivity between neighboring amino acids. To this purpose, the linear and nonlinear regimes of the electrical response to an applied bias are studied when the protein is in its native state or in an active state. In the linear response regime, results evidence a significant difference in the electrical properties of bRC when the pH value of the solution in which the protein is embedded changes from acid to basic. In the non-linear response regime, the current-voltage characteristics experimentally reported in the recent literature are interpreted in terms of a sequential tunneling mechanism of charge transfer. The qualitative agreement of present findings with available experiments strongly suggests the use of this protein as a bio-rheostat or a pH sensor. Full article
(This article belongs to the Special Issue Frontiers in Optical Materials)
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11 pages, 3027 KiB  
Article
Electrospinning Preparation of GaN:ZnO Solid Solution Nanorods with Visible-Light-Driven Photocatalytic Activity toward H2 Production
by Jingyun Mao, Huiling Zhong, Xinpin Liu, Qingrong Qian, Yongjin Luo, Liren Xiao and Hun Xue
Appl. Sci. 2021, 11(22), 10854; https://doi.org/10.3390/app112210854 - 17 Nov 2021
Cited by 7 | Viewed by 1995
Abstract
The development of a facile method for the synthesis of GaN:ZnO solid solution, an attractive material with a wurtzite-type structure, is vital to enhance its photocatalytic activity toward H2 evolution. Herein, GaN:ZnO solid solution nanorods with diameters of around 180 nm were [...] Read more.
The development of a facile method for the synthesis of GaN:ZnO solid solution, an attractive material with a wurtzite-type structure, is vital to enhance its photocatalytic activity toward H2 evolution. Herein, GaN:ZnO solid solution nanorods with diameters of around 180 nm were fabricated by combining the electro-spun method with a sequentially calcinating process. Photocatalytic water-splitting activities of the as-obtained samples loaded with Rh2−yCryO3 co-catalyst were estimated by H2 evolution under visible-light irradiation. The as-prepared GaN:ZnO nanorods at a nitridation temperature of 850 °C showed the optimal performance. Careful characterization of the GaN:ZnO solid solution nanorods indicated that the nitridation temperature is an important parameter affecting the photocatalytic performance, which is related to the specific surface area and the absorbable visible-light wavelength range. Finally, the mechanism of the GaN:ZnO solid solution nanorods was also investigated. The proposed synthesis strategy paves a new way to realize excellent activity and recyclability of GaN:ZnO solid solution nanorod photocatalysts for hydrogen generation. Full article
(This article belongs to the Special Issue Frontiers in Optical Materials)
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