Femtosecond Laser Processing Technology for Anti-Reflection Surfaces of Hard Materials

Xie, Xiaofan; Li, Yunfei; Gong, Wei; Bai, Zhenxu; Yu, Yu; Wang, Yulei; Ding, Yu; Lü, Zhiwei

doi:10.3390/mi13071084

Cited by 13 publications

(5 citation statements)

References 143 publications

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“…The anti-re ective properties of material surfaces can improve the resolution of speci c electromagnetic signals and aid in the shielding and elimination of clear interference signals [25]. Metal surfaces with both superhydrophobicity and anti-re ection have broad applications in elds such as solar cells, optoelectronic products, and military stealth.…”

Section: Anti-re Ective Propertiesmentioning

confidence: 99%

Fabrication of superhydrophobic, permeable, and anti-reflective porous steel surfaces using laser ablation and heat treatment

Zhu,

Liu,

2024

Int J Adv Manuf Technol

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Achieving high water resistance, good permeability, and anti-re ectivity on metal surfaces in a costeffective and e cient manner has always been a major challenge. This study addresses these challenges by utilizing laser ablation and heat treatment to achieve high water resistance, breathability, and anti-re ection properties in porous steel. The laser ablation and heat treatment process generated a unique porous nested structure on the surface and imparted excellent hydrophobicity and low adhesion properties on the porous steel surface. The size and density of the porous nested structure can be adjusted by changing the laser parameters. Notably, hydrophobicity of the surface is demonstrated to be closely related to the complexity of the surface microstructure, which follows the same trend as the permeability and anti-re ectivity. Speci cally, higher laser power and smaller laser spacing generate structures with greater aspect ratios and higher porosity, resulting in a rough surface with an increased air contact area and, consequently, an increase in the viscous permeability coe cient (B). Moreover, the intricate porous nested structure acts as a complex "light trap," whereby the re ectivity of the superhydrophobic porous steel surface ( laser power of 25.4 W and scanning interval of 100 µm) can be less than 15% across a wide wavelength range (200 nm-1800 nm). This study presents a method for fabricating multifunctional surfaces with superhydrophobicity, permeability and anti-re ectivity on permeable steel. The method provides an e cient and cost-effective solution to improve the performance of existing materials and has great potential for a wide range of applications such as solar cells, military stealth, and reduced navigation resistance.

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Section: Anti-re Ective Propertiesmentioning

confidence: 99%

Fabrication of superhydrophobic, permeable, and anti-reflective porous steel surfaces using laser ablation and heat treatment

Zhu,

Liu,

2024

Int J Adv Manuf Technol

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“…Undesired reflected light can lead to a reduction in optical power and the lifespan of these devices. [ 24 ] Prior to the discovery of structured anti‐reflective surfaces in nature, anti‐reflective coatings were primarily employed to diminish surface reflectivity. Various strategies were developed for this purpose, as described below.…”

Section: The Physics Behind Optical Multifunctional Surfacesmentioning

confidence: 99%

A Review on Potential Mechanically Resistant Materials for Optical Multifunctional Surfaces: Bioinspired Surfaces with Advanced Properties

Sarieddine,

Kadiri,

Guelorget

et al. 2023

Adv Materials Inter

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Mimicking naturethrough nanostructuring allows the creation of multifunctional surfaces withremarkable properties, such as anti‐reflectivity, high optical transmittanceand controlled wettability, enabling anti‐icing or anti‐fogging behaviors. These multifunctionalsurfaces have gained significant interest in civil and military domains. However,integrating them into real‐life applications faces challenges related tocost, high‐throughput large‐scale compatible nanofabrication techniques, andtheir mechanical resistance. While sub‐wavelength patterning improves the optical performance,it often comes at the cost of compromising the mechanical resistance. As opticalperformance improves, mechanical resistance tends to deteriorate, and viceversa. To address this challenge, taking inspiration from the lotus leafstructure, where patterns are covered by a thin 2D wax film, covering thepatterns of structured surfaces with a protective layer can be a viablesolution. This protective layer should enhance the mechanical resistance of thesurface without compromising its multifunctional capabilities. This reviewhighlights the most suitable materials that can be employed as protectivecoatings and their potential to enhance the resistance of structured surfaces.The fundamental concept behind the creation of multifunctional optical surfacesis discussed, followed by a comprehensive examination of mechanical tests thatcan be utilized to characterize their mechanical behavior. This review aims topave the way for the development of durable multifunctional optical surfaces,making them more amenable to industrial applications.

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“…In nature, dragonflies are famous for not only their wonderful flying skills but also their excellent antireflectivity and superhydrophobicity due to the special structures on their wings. − Dragonfly provides great inspiration for the fabrication of anti-reflective surfaces with microstructures array. It has been demonstrated that the manufacture of biomimetic anti-reflective subwavelength structure (ASS) array on the surface of infrared windows can provide a gradient refractive index profile between the two sides of the interface, which can significantly improve transmittance and hydrophobic properties. − …”

Section: Introductionmentioning

confidence: 99%

Bioinspired Near-Full Transmittance MgF₂ Window for Infrared Detection in Extremely Complex Environments

Ding

Liu

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Due to the extreme complexity of the anti-reflective subwavelength structure (ASS) parameters and the drastic limitation of Gaussian beam manufacturing accuracy, it remains a great challenge to manufacture ASS with ultrahigh transmittance on the surface of infrared window materials (such as magnesium fluoride (MgF2)) directly by femtosecond laser. Here, a design, manufacturing, and characterization method that can produce an ultrahigh-performance infrared window by femtosecond laser Bessel beam is proposed. Inspired by the excellent anti-reflective and hydrophobic properties of the special structure of dragonfly wings, a similar structural pattern with grid-distributed truncated cones is designed and optimized for its corresponding parameters to achieve near-full transmittance. The desired submicron structures are successfully fabricated by a Bessel beam after effectively shaping the beam. As a practical application, the bioinspired ASS is manufactured on the surface of MgF2, achieving an ultrahigh transmittance of 99.896% in the broadband of 3–5 μm, ultrawide angle of incidence (over 70% at 75° incidence), and good hydrophobicity with a water contact angle of 99.805°. Results from infrared thermal imaging experiments show that the ultrahigh-transmittance MgF2 window has superior image acquisition and anti-interference performance (3.9–8.6% image contrast enhancement and more accurate image edge recognition) in an environment with multiple interfering factors, which may play a significant role in facilitating applications of infrared thermal imaging technologies in extremely complex environments.

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Femtosecond Laser Processing Technology for Anti-Reflection Surfaces of Hard Materials

Cited by 13 publications

References 143 publications

Fabrication of superhydrophobic, permeable, and anti-reflective porous steel surfaces using laser ablation and heat treatment

Fabrication of superhydrophobic, permeable, and anti-reflective porous steel surfaces using laser ablation and heat treatment

A Review on Potential Mechanically Resistant Materials for Optical Multifunctional Surfaces: Bioinspired Surfaces with Advanced Properties

Bioinspired Near-Full Transmittance MgF₂ Window for Infrared Detection in Extremely Complex Environments

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Femtosecond Laser Processing Technology for Anti-Reflection Surfaces of Hard Materials

Cited by 13 publications

References 143 publications

Fabrication of superhydrophobic, permeable, and anti-reflective porous steel surfaces using laser ablation and heat treatment

Fabrication of superhydrophobic, permeable, and anti-reflective porous steel surfaces using laser ablation and heat treatment

A Review on Potential Mechanically Resistant Materials for Optical Multifunctional Surfaces: Bioinspired Surfaces with Advanced Properties

Bioinspired Near-Full Transmittance MgF2 Window for Infrared Detection in Extremely Complex Environments

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Product

Resources

About

Bioinspired Near-Full Transmittance MgF₂ Window for Infrared Detection in Extremely Complex Environments