Detection and analysis of photo-acoustic emission in Direct Laser Interference Patterning

Abstract Functional laser texturing by means of Direct Laser Interference Patterning is one of the most efficient approaches to fabricate well-defined micro textures which mimic natural surfaces, such as the lotus effect for self-cleaning properties or shark skin for reduced friction. While numerous...

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Autores principales:	Tobias Steege, Sabri Alamri, Andrés Fabián Lasagni, Tim Kunze
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0dd6827c18964b2eb2617faf74afb4b8
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spelling	oai:doaj.org-article:0dd6827c18964b2eb2617faf74afb4b82021-12-02T18:30:40ZDetection and analysis of photo-acoustic emission in Direct Laser Interference Patterning10.1038/s41598-021-93927-w2045-2322https://doaj.org/article/0dd6827c18964b2eb2617faf74afb4b82021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93927-whttps://doaj.org/toc/2045-2322Abstract Functional laser texturing by means of Direct Laser Interference Patterning is one of the most efficient approaches to fabricate well-defined micro textures which mimic natural surfaces, such as the lotus effect for self-cleaning properties or shark skin for reduced friction. While numerous technical and theoretical improvements have been demonstrated, strategies for process monitoring are yet to be implemented in DLIP, for instance aiming to treat complex and non-plane surfaces. Over the last 35 years, it has been shown that the sound pressure generated by a laser beam hitting a surface and producing ablation can be detected and analysed using simple and commercially available transducers and microphones. This work describes the detection and analysis of photo-acoustic signals acquired from airborne acoustic emission during DLIP as a direct result of the laser–material interaction. The study includes the characterization of the acoustic emission during the fabrication of line-like micro textures with different spatial periods and depths, the interpretation the spectral signatures deriving from single spot and interference ablation, as well as a detailed investigation of the vertical extent of the interference effect based on the ablated area and its variation with the interference period. The results show the possibility to develop an autofocusing system using only the signals from the acoustic emission for 3D processing, as well as the possibility to predict deviations in the DLIP processing parameters.Tobias SteegeSabri AlamriAndrés Fabián LasagniTim KunzeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tobias Steege Sabri Alamri Andrés Fabián Lasagni Tim Kunze Detection and analysis of photo-acoustic emission in Direct Laser Interference Patterning
description	Abstract Functional laser texturing by means of Direct Laser Interference Patterning is one of the most efficient approaches to fabricate well-defined micro textures which mimic natural surfaces, such as the lotus effect for self-cleaning properties or shark skin for reduced friction. While numerous technical and theoretical improvements have been demonstrated, strategies for process monitoring are yet to be implemented in DLIP, for instance aiming to treat complex and non-plane surfaces. Over the last 35 years, it has been shown that the sound pressure generated by a laser beam hitting a surface and producing ablation can be detected and analysed using simple and commercially available transducers and microphones. This work describes the detection and analysis of photo-acoustic signals acquired from airborne acoustic emission during DLIP as a direct result of the laser–material interaction. The study includes the characterization of the acoustic emission during the fabrication of line-like micro textures with different spatial periods and depths, the interpretation the spectral signatures deriving from single spot and interference ablation, as well as a detailed investigation of the vertical extent of the interference effect based on the ablated area and its variation with the interference period. The results show the possibility to develop an autofocusing system using only the signals from the acoustic emission for 3D processing, as well as the possibility to predict deviations in the DLIP processing parameters.
format	article
author	Tobias Steege Sabri Alamri Andrés Fabián Lasagni Tim Kunze
author_facet	Tobias Steege Sabri Alamri Andrés Fabián Lasagni Tim Kunze
author_sort	Tobias Steege
title	Detection and analysis of photo-acoustic emission in Direct Laser Interference Patterning
title_short	Detection and analysis of photo-acoustic emission in Direct Laser Interference Patterning
title_full	Detection and analysis of photo-acoustic emission in Direct Laser Interference Patterning
title_fullStr	Detection and analysis of photo-acoustic emission in Direct Laser Interference Patterning
title_full_unstemmed	Detection and analysis of photo-acoustic emission in Direct Laser Interference Patterning
title_sort	detection and analysis of photo-acoustic emission in direct laser interference patterning
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0dd6827c18964b2eb2617faf74afb4b8
work_keys_str_mv	AT tobiassteege detectionandanalysisofphotoacousticemissionindirectlaserinterferencepatterning AT sabrialamri detectionandanalysisofphotoacousticemissionindirectlaserinterferencepatterning AT andresfabianlasagni detectionandanalysisofphotoacousticemissionindirectlaserinterferencepatterning AT timkunze detectionandanalysisofphotoacousticemissionindirectlaserinterferencepatterning
_version_	1718377962093412352

Detection and analysis of photo-acoustic emission in Direct Laser Interference Patterning

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