Advancements in Lasers: Applications and Future Trends

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

Deadline for manuscript submissions: 10 July 2025 | Viewed by 598

Special Issue Editors


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Guest Editor
Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, School of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China
Interests: semiconductor lasers; OFC; integrated optoelectronics; coating

E-Mail Website
Guest Editor
Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, School of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China
Interests: film; semiconductor lasers; integrated optoelectronics

Special Issue Information

Dear Colleagues,

Theoretical, experimental and engineering developments in multifunctional coatings as single or multiple layers covering different substrates are the most important research field in semiconductor laser fabrication and optical transmission. This has been spurred primarily by their performance in the demanding environmental conditions required by current applications, ranging from pump sources; optical communication; metasurfaces; and the aerospace, medical, automotive and chemical industries to oil and gas detection technologies. Driven by the current state of knowledge of passivation and strain mechanisms, the need to maintain structural material integrity and reliability assets in harsh environments and a renewed impetus towards the performance of new nanostructured coating systems have created a huge demand for experimental, theoretical, modelling and engineering activities.

The manufacturing, designing, testing, and engineering of high-performance nanostructured materials that are photoelectrically active (e.g., perovskite, metals, graphene, carbon nanotubes, conductive polymers, etc.), capable of serving as physical protection layers (organic polymers, composite materials, ceramic materials, etc.) or both provide unprecedented functionality and opportunities for multifunctional coatings protecting metallic structures (semiconductors, fibres, mirrors and lenses).

This Special Issue will serve as a forum for papers discussing the following concepts:

  • Theoretical, experimental and engineering research, knowledge and new ideas in optoelectronic protective and preventive coating mechanisms.
  • Recent developments in multifunctional organic, inorganic, perovskite and hybrid coatings.
  • Coatings produced by different processes, including but not limited to additive manufacturing processes, thermal spray, laser and plasma processing, CVD, sputtering, Ebeam, etc.
  • Experimenting with and processing high-performance coatings with exposure to high temperatures, high stress, and other extreme environmental conditions.
  • Understanding the degradation mechanisms of coatings through friction, wear or other dynamic loading conditions and passivation techniques.
  • The development of test methods considering the interplay between mechanical, optoelectronic and electrochemical interactions and the ability to predict performance and/or reliability with an emphasis on valid, accelerated performance tests and the relation between test techniques and field performance data.
  • Computer modelling and simulation to predict coating properties, performance, durability and reliability in service environments.
  • Monolithic integration OFC computer modelling and simulations to predict OFC properties and performance.

Dr. Zhongliang Qiao
Dr. Zaijin Li
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

  • passivation coatings
  • performance modelling
  • reliability coatings
  • damage evolution modelling of coatings
  • OFC

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Published Papers (1 paper)

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Research

8 pages, 3741 KiB  
Article
Etching Processing of InGaAs/InAlAs Quantum Cascade Laser
by Qi Wu, Yana Zhu, Dongxin Xu, Zaijin Li, Yi Qu, Zhongliang Qiao, Guojun Liu, Zhibin Zhao, Lina Zeng, Hao Chen and Lin Li
Coatings 2024, 14(11), 1448; https://doi.org/10.3390/coatings14111448 - 13 Nov 2024
Viewed by 462
Abstract
The 3–5 μm mid-infrared band is the atmospheric window band, where there are absorption peaks of many molecules. It plays an important role in trace gas detection, directional infrared countermeasures, biomedicine, and free-space optical communications. The wet etching process of the designed InGaAs/InAlAs [...] Read more.
The 3–5 μm mid-infrared band is the atmospheric window band, where there are absorption peaks of many molecules. It plays an important role in trace gas detection, directional infrared countermeasures, biomedicine, and free-space optical communications. The wet etching process of the designed InGaAs/InAlAs quantum cascade laser with superlattice structure was explored to provide a good experimental basis for the research and development of lasers. The HBr:HNO3:H2O series of etching solutions were selected for corrosion experiments, and the surface morphology was observed by scanning electron microscopy (SEM) and metallographic microscopy to obtain the corrosion rate of the etching solution. The experimental results show that the etching liquid ratio is HBr:HNO3:H2O = 1:1:10, and the etching rate is 0.6 μm/min. A quantum cascade laser that works continuously at room temperature was prepared, with an injection strip width of 7 μm, a cavity length of 4mm, and an operating temperature of 20 °C. The device works in continuous mode (CW), with a maximum continuous output power of about 186 mW, a threshold current of about 0.4 A, a threshold current density of about 1.428 kA/cm2, a device center wavelength of about 4424 nm, a side mode suppression ratio of 28 dB, and a spectrum full width at half maximum of 2 nm. Full article
(This article belongs to the Special Issue Advancements in Lasers: Applications and Future Trends)
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