Design, Manufacturing and Measurement of Optical Film Coatings II

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 1624

Special Issue Editor


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Guest Editor
Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan
Interests: optical coatings of metamaterials; dielectric anisotropic thin films; novel polarization devices; surface plasmon resonance; 2-D and 3-D nanosculptured thin film
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Special Issue Information

Dear Colleagues,

Optical coatings have been widely applied in various optical devices to perform antireflection, high reflection, beam splitting, and bandpass filtering. Due to the rapid progress of science and engineering, optical coatings are desired which offer more advanced performance, such as ultra-thin perfect absorption, perfect phase retardation, and wide-angle bandpass filtering. It is expected that diverse nanostructures and more materials will appear in coatings to support various needs. In order to detect the optical properties of thin films, new techniques for measuring complex-structured thin films have also been developed.

Potential topics for this Special Issue include, but are not limited to:

(1) Novel applications in light harvest, lighting, 3D recognition, bio-sensing and display;

(2) Design, fabrication and application for layered metamaterials;

(3) New measurement and analysis for nanostructured thin films;

(4) Novel function prediction based on precise simulations;

(5) Bio-mimic and bio-inspired optical coatings;

This second Special Issue is the result of a successful first Issue. Contributions to this new Special Issue are welcomed on all subjects related to the theme, including the design, manufacturing and measurement of optical thin film coatings. Especially welcome are papers that raise new questions and new possibilities or examine old problems from a new angle.

Prof. Dr. Yi-Jun Jen
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 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.

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. Coatings 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 2600 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.

Published Papers (1 paper)

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Research

15 pages, 8721 KiB  
Article
Characterization of Nitrogen-Doped TiO2 Films Prepared by Arc Ion Plating without Substrate Heating in Various N2/O2 Gas Mixture Ratios
by Hsing-Yu Wu, Wen-Chun Huang, Jyh-Liang Wang, Guo-Yu Yu, Yung-Shin Sun and Jin-Cherng Hsu
Coatings 2023, 13(3), 654; https://doi.org/10.3390/coatings13030654 - 20 Mar 2023
Viewed by 1167
Abstract
Nitrogen-doped TiO2 films exhibit good photocatalytic ability in the visible (VIS) light region. This study reports the fabrication of these films using arc ion plating (AIP) in different ratios of nitrogen partial pressure (PN2) to oxygen partial pressure (PO2 [...] Read more.
Nitrogen-doped TiO2 films exhibit good photocatalytic ability in the visible (VIS) light region. This study reports the fabrication of these films using arc ion plating (AIP) in different ratios of nitrogen partial pressure (PN2) to oxygen partial pressure (PO2) without substrate heating and/or applied bias. This approach allows a significant broadening of the range of possible substrates to be used. X-ray diffraction (XRD) patterns indicate that these films deposited at room temperature are amorphous, and surface electron microscope (SEM) and atomic force microscope (AFM) images show that they have rough surfaces. Their transmittance and optical properties are measured with a spectrometer and ellipsometer, respectively. In addition, the bandgap energies of these amorphous films are derived by the ellipsometer from the Tauc–Lorentz (TL) model. The results indicate that the N-doped TiO2 film with a PN2/PO2 ratio of 1/4 attains the narrowest bandgap and the highest absorbance in the visible region. It can be attributed to the prominent Ti–N peaks observed in the sample’s Ti and N X-ray photoelectron spectroscopy (XPS) spectra. In addition, verified with the methylene blue (MB) test, this sample exhibits the best photocatalytic performance for its narrowest energy gap. Full article
(This article belongs to the Special Issue Design, Manufacturing and Measurement of Optical Film Coatings II)
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