Scalable patterning using laser-induced shock waves

Saidjafarzoda Ilhom, Khomidkhodza Kholikov, Peizhen Li, Claire Ottman, Dylan Sanford, Zachary Thomas, Omer San, Haluk E. Karaca, Ali O. Er

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


An advanced direct imprinting method with low cost, quick, and minimal environmental impact to create a thermally controllable surface pattern using the laser pulses is reported. Patterned microindents were generated on Ni50Ti50 shape memory alloys and aluminum using an Nd: YAG laser operating at 1064 nm combined with a 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 and optical microscope images show that various patterns were obtained on the surface with high fidelity. One-dimensional profile analysis indicates that the depth of the patterned sample initially increases with the laser energy and later levels off. Our simulations of laser irradiation process also confirm that high temperature and high pressure could be generated when the laser energy density of 2 J/cm2 is used.

Original languageEnglish
Article number041413
JournalOptical Engineering
Issue number4
StatePublished - Apr 1 2018

Bibliographical note

Publisher Copyright:
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).


  • aluminum
  • laser shock wave
  • patterned surfaces
  • shape memory alloys

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Engineering


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