Picosecond laser-induced shock waves patterning on shape memory alloys

Bektur Abdisatarov, Ilhom Saidjafarzoda, Haluk E. Karaca, Ali O. Er

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


An advanced direct imprinting method with low cost, quick, and minimal environmental impact to create a thermally controllable surface pattern using nanosecond and picosecond laser pulses is reported. Patterned micro indents were generated on shape memory alloys (SMA) and aluminum using nanosecond and picosecond laser operating at various wavelengths combined with suitable transparent overlay, a sacrificial layer of graphite, and copper grid. Laser pulses at different energy densities which generate pressure pulses up to a few GPA on the surface were focused through the confinement medium, ablating the copper grid to create plasma and transferring the grid pattern onto the surface. Scanning electron microscope (SEM), atomic force microscope (AFM), and optical microscope images show that various patterns were obtained on the surface with high fidelity. Optical profile analysis indicates that the depth of the patterned sample initially increases with the laser energy and later levels off. Our simulations of the laser irradiation process also confirm that high temperature and high pressure (up to 10 GPA) could be generated when laser energy of 2 J/cm2 is used. Experimental data is in good agreement with a theoretical simulation of laser-induced shock wave propagation inside the material. Stress wave closely followed the rise time of the laser pulse to its peak values and initial decay. Ongoing experiments on a different wavelength and confinement medium conditions and recovery ratio (ratio of the depth of cold indent to the depth of the initial indent) will also be presented.

Original languageEnglish
Title of host publicationFrontiers in Ultrafast Optics
Subtitle of host publicationBiomedical, Scientific, and Industrial Applications XX
EditorsPeter R. Herman, Michel Meunier, Roberto Osellame
ISBN (Electronic)9781510633032
StatePublished - 2020
EventFrontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XX 2020 - San Francisco, United States
Duration: Feb 1 2020Feb 4 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceFrontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XX 2020
Country/TerritoryUnited States
CitySan Francisco

Bibliographical note

Publisher Copyright:
© 2020 SPIE.


  • Laser shock wave
  • Patterned surfaces
  • Shape memory alloy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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