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Title: Morphological changes in ultrafast laser ablation plumes with varying spot size

Journal Article · · Optics Express
DOI:https://doi.org/10.1364/OE.23.015608· OSTI ID:1214803
 [1];  [2];  [2];  [1]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Purdue Univ., West Lafayette, IN (United States)

We investigated the role of spot size on plume morphology during ultrafast laser ablation of metal targets. Our results show that the spatial features of fs LA plumes are strongly dependent on the focal spot size. Two-dimensional self-emission images showed that the shape of the ultrafast laser ablation plumes changes from spherical to cylindrical with an increasing spot size from 100 to 600 μm. The changes in plume morphology and internal structures are related to ion emission dynamics from the plasma, where broader angular ion distribution and faster ions are noticed for the smallest spot size used. The present results clearly show that the morphological changes in the plume with spot size are independent of laser pulse width.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1214803
Journal Information:
Optics Express, Vol. 23, Issue 12; ISSN 1094-4087
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 46 works
Citation information provided by
Web of Science

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Generation of high-temperature and low-density plasma with strong spectral intensity by changing the distance between the focusing lens and target surface in femtosecond laser-induced breakdown spectroscopy journal January 2019
Characteristics of laser-induced aluminum plasma plumes after increasing sample temperature and spatial confinement journal January 2019
Influence of distance between focusing lens and target surface on laser-induced Cu plasma temperature journal March 2018
Optical spectroscopy of laser-produced plasmas for standoff isotopic analysis journal June 2018
Digital interference microscopy and density reconstruction of picosecond infrared laser desorption at the water-air interface journal September 2018
Progress of laser-induced breakdown spectroscopy in nuclear industry applications journal October 2019
Ultrafast dynamics observation during femtosecond laser-material interaction journal September 2019
The Effect of Spot Size Combination Mode on Ablation Morphology of Aluminum Alloy by Millisecond-Nanosecond Combined-Pulse Laser journal August 2018