A comparison of characteristics of periodic surface micro/nano structures generated via single laser beam direct writing and particle lens array parallel beam processing

Fatema H. Rajab*, Anmar K. Al-Jumaily, Tayf Tariq A.S, Sorin Laurentiu Stanescu, Ahmad W. AlShaer, Lin Li, Rwayda Kh. S. Al-Hamd

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

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    Abstract

    Abstract Changing material surface micro/nanostructures using laser beam texturing is a valuable approach in wide applications such as control of cell/bacterial adhesion and proliferation, solar cells and optical metamaterials. Here, we report a comparison of the characteristics of surface micro/nanostructures produced using single beam laser direct writing and particle lens array parallel laser beam patterning. A Nd:YVO4 nanosecond pulsed laser at the wavelength of 532 nm was used in the laser direct writing method to texture the stainless steel surface submerged in water and in air with different scanning patterns. Changes in surface morphology, wettability, surface chemistry, and optical reflectivity were analyzed. In the particle lens array method, an excimer nanosecond laser at 248 nm wavelength was adopted to produce surface patterns on GeSbTe (GST) film coated on a polycarbonate substrate by splitting and focusing a single laser beam into millions of parallel breams. Single beam laser direct writing shows that the surface of high roughness and oxygen percentage content presented high wettability and low reflectivity characteristics. However, the controllability of the type of surface micro/nanopatterns is limited. The parallel laser beam processing using particle lens array allows rapid production of user designed periodic surface patterns at nanoscale overcoming the optical diffraction limit with a high degree of controllability. Controlling the uniformity of the particle lens array is a challenge.
    Original languageEnglish
    Article number021007
    Number of pages10
    JournalJournal of Micro and Nano-Manufacturing
    Volume9
    Issue number2
    Early online date15 Sep 2021
    DOIs
    Publication statusPublished - 15 Sep 2021

    Keywords

    • Laser
    • Surface texture
    • Structure
    • Micro
    • Nano
    • Pattern
    • Microsphere
    • Parallel
    • Morphology
    • Wettability
    • Reflectivity
    • Particle lens array

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