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Coatings
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Research on Infrared and Laser Thin Films
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Research on Infrared and Laser Thin Films

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Thin Films".

Deadline for manuscript submissions: 31 March 2025 | Viewed by 7191

Special Issue Editors

Dr. Weibo Duan

E-Mail Website
Guest Editor
Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
Interests: thin film coatings for space remote sensing
Dr. Suotao Dong

E-Mail Website
Guest Editor
School of OptoElectronic Engineering, Changchun University of Science and Technology, Changchun 130013, China
Interests: advanced optical thin film technology
Dr. Xiuhua Fu

E-Mail Website
Guest Editor
School of OptoElectronic Engineering, Changchun University of Science and Technology, Changchun 130013, China
Interests: advanced optical thin film technology

Special Issue Information

Dear Colleagues,

The module mainly includes two parts: infrared thin film and laser thin film. Infrared films are involved in medical, agricultural, biological, military, and other fields. It plays an important role in various devices, such as infrared detectors, infrared sensors, and infrared thermometers. The laser thin film device is one of the important components in the laser system, and its excellent quality and performance are the keys to ensure the normal operation of the laser system. The application of laser thin films in high-power laser devices is not uncommon, and it also plays a crucial role in some laser medical equipment. It is the focus of research in the field of optical thin films. This module aims to record optical films in various related fields, including laser films and infrared films. Whether it is applied to ultraviolet films used for disinfection and medical purposes, or functional films can be covered. At the same time, some articles related to semiconductor thin films are adopted, covering a wide range of contents, and contributions are welcome.

The scope of this Special Issue will cover, but will not be limited to, the following contents:

  • Laser film (high power anti laser damage antireflection film, anti laser damage reflective film, etc.);
  • Infrared film (infrared detector film, infrared thermometer film, infrared sensor film, infrared optical measuring instrument film, etc.);
  • Ultraviolet film (ultraviolet disinfection device film, ultraviolet optical measuring instrument film, ultraviolet solar blind communication filter film, etc.);
  • Optical thin films (design, process, preparation, materials, properties, applications, etc.);
  • Semiconductor thin films (semiconductor laser thin films, ITO thin films, electron beam lithography thin films, etc.);
  • Beam splitter (energy beam splitter, transmissivity beam splitter, etc.);
  • Related coating of chalcogenide glass (coating of molded chalcogenide glass, infrared antireflection coating, etc.);
  • Superhard thin film (screen super hard reflective film, super hard antireflection film, etc.);
  • Polarization film (depolarization film, polarization beam splitter, etc.);
  • Bandpass filter (narrowband filter, broadband filter film, etc.);
  • AR/VR related films (augmented reality waveguide scheme design, virtual reality films, etc.).

Dr. Weibo Duan
Dr. Suotao Dong
Dr. Xiuhua Fu
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.

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.

Keywords

  • infrared
  • laser
  • thin film
  • optical
  • UV
  • semiconductor

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Published Papers (4 papers)

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Research

9 pages, 3460 KiB  
Article
Design and Manufacturing of Filter Sets for Dual-Color Synchronous Gene Sequencing
by Chao Ban, Peng Gao, Shaopeng Ren, Ruisheng Wang, Zhonglian Wang, Xianpeng Liang, Xiaojun Yin and Shuaifeng Zhao
Coatings 2023, 13(9), 1555; https://doi.org/10.3390/coatings13091555 - 6 Sep 2023
Viewed by 1264
Abstract
Gene sequencing is an important means for modern life sciences research and clinical diagnosis. In recent years, dual-color synchronous gene sequencing has developed rapidly due to its excellent properties such as high throughput, fast speed, miniaturization, and low cost. In this paper, a [...] Read more.
Gene sequencing is an important means for modern life sciences research and clinical diagnosis. In recent years, dual-color synchronous gene sequencing has developed rapidly due to its excellent properties such as high throughput, fast speed, miniaturization, and low cost. In this paper, a type of dual-color synchronous gene sequencing optical path structure, which is based on the fluorescence-detection principle, was designed. FAM and TAMRA were selected as the fluorophores, which corresponded to excitation light sources with 488 nm laser and 543 nm laser, respectively. Combining the optical system and fluorophores, we designed the parameters of the filter sets, including the details of design methods for dual-bandpass filters and dual-notch dichromic mirrors. Moreover, these filters were successfully manufactured by ion-assisted deposition and magnetron-sputtering methods with extreme precision. The satisfying application effect was demonstrated when these products were applied in customer-desktop medium-throughput gene sequencers. Full article
(This article belongs to the Special Issue Research on Infrared and Laser Thin Films)
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13 pages, 3943 KiB  
Article
Development of Visible Multi−Bandpass Filter Based on F−P Structure
by Hongyan Jiang, Rongwei Fan, Yiqin Ji, Kai Guo, Shifu Xiong, Bing Sun, Chen Zhang, Xing Wang and Deying Chen
Coatings 2023, 13(8), 1341; https://doi.org/10.3390/coatings13081341 - 30 Jul 2023
Cited by 1 | Viewed by 1468
Abstract
In order to reduce the noise interference of smart wearable devices, spectral filtering technology is used to suppress noise. This technology prevents interference signals from entering the detector from the source, thereby achieving high−precision noise reduction processing. According to the system requirements, a [...] Read more.
In order to reduce the noise interference of smart wearable devices, spectral filtering technology is used to suppress noise. This technology prevents interference signals from entering the detector from the source, thereby achieving high−precision noise reduction processing. According to the system requirements, a multi−bandpass filter with a wavelength range of 400~1000 nm was designed and prepared on a BK7 substrate. Ta2O5 and SiO2 were selected as the high− and low−refractive−index materials, respectively. By analyzing the −Fabry–Perot narrowband theory, the bandwidth matching coefficient was computed, and the interference order was calculated using the interval of the transmission peak wavelengths. Multiple F−P coating systems were connected through the matching layer to adjust the position of the transmission peak and broaden the bandwidth range. The design was optimized using Macloed film system design software, resulting in the design of a wide half−wave and cutoff multi−bandpass filter. The appropriate preparation process was chosen based on changes in refractive index, surface roughness, and the temperature gradient of the materials. The filter was then produced using Leybold SYRUSpro1110. Sensitivity, filter roughness, and the weak absorption of the film system were tested, and the results met the system requirements. Full article
(This article belongs to the Special Issue Research on Infrared and Laser Thin Films)
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15 pages, 6538 KiB  
Article
Development of Resonant Cavity Film for 575 nm All-Solid-State Laser System
by Han Zhu, Yawu Xin, Yunru Chen, Shihui Ma, Yuxia Zhang, Yongchao Peng, Yixin Lin, Shifu Xiong and Zhanggui Hu
Coatings 2023, 13(7), 1278; https://doi.org/10.3390/coatings13071278 - 21 Jul 2023
Viewed by 1407
Abstract
Yellow lasers have attracted much attention due to their applications in biomedicine, astronomy and spectroscopy, and the resonant cavity is an important part of lasers. In this work, the resonant cavity film was studied and prepared using physical vapor deposition (PVD) technology to [...] Read more.
Yellow lasers have attracted much attention due to their applications in biomedicine, astronomy and spectroscopy, and the resonant cavity is an important part of lasers. In this work, the resonant cavity film was studied and prepared using physical vapor deposition (PVD) technology to couple and match the optical properties of Dy,Tb:LuLiF4 crystal to generate yellow laser. In the process of film deposition, the substrate temperature has an important influence on the quality of the film. Therefore, we first investigated the effect of HfO2 film quality at different substrate temperatures. Furthermore, the multilayer film was designed to couple and match the optical properties of Dy,Tb:LuLiF4 crystal. According to the designed film system scheme, HfO2 and UV-SiO2 were used as high- and low-refractive index film materials for resonant cavity film preparation using the PVD technique, and the effect of process parameters on the film quality was investigated. A 450 nm pump laser was used to directly pump Dy3+ to excite and generate the yellow laser. In this process, the excited radiation jump occurs in the crystal, and the generated laser in the new band reaches a certain threshold after oscillation and gain in the resonant cavity, thus successfully outputting a 575 nm yellow laser. Full article
(This article belongs to the Special Issue Research on Infrared and Laser Thin Films)
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10 pages, 5011 KiB  
Article
A Dichroic Beamsplitter for the Laser Protection of Infrared Detectors
by Jian Cao, Binbin Jiang, Hongfei Jiao, Xinshang Niu, Jinlong Zhang, Zhong Zhang, Xinbin Cheng and Zhanshan Wang
Coatings 2022, 12(12), 1861; https://doi.org/10.3390/coatings12121861 - 30 Nov 2022
Cited by 4 | Viewed by 2051
Abstract
The design and fabrication approach of a dichroic beamsplitter to meet the protection requirements of infrared detectors for blinding laser weapons is presented. The dichroic beamsplitter must protect against 1064 and 532 nm lasers and have high transmittance in the detection beam band [...] Read more.
The design and fabrication approach of a dichroic beamsplitter to meet the protection requirements of infrared detectors for blinding laser weapons is presented. The dichroic beamsplitter must protect against 1064 and 532 nm lasers and have high transmittance in the detection beam band of 3.6–4.7 µm. In order to realize the protection and antireflection (AR) functions of the dichroic beamsplitter, Ta2O5, which has a wide band gap and high thermodynamic stability, was selected as the high-refractive-index material. A multilayer stack was deposited on a silicon substrate by ion-assisted electron beam evaporation. The manufactured dichroic beamsplitter features a high laser-induced damage threshold (LIDT), excellent spectral characteristics in the requested spectral region, and good environmental stability. Full article
(This article belongs to the Special Issue Research on Infrared and Laser Thin Films)
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