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Title: Interaction of doughnut-shaped laser pulses with glasses

Journal Article · · Journal of the Optical Society of America. Part B, Optical Physics
 [1];  [2];  [3];  [4]
  1. Novosibirsk State Univ., Inst. of Computational Technologies, and Novosibirsk State Technical Univ., Novosibirsk (Russian Federation)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Novosibirsk State Univ. and Inst. of Computational Technologies, Novosibirsk (Russian Federation)
  4. HiLASE Centre, Dolni Brezany (Czech Republic). Inst. of Physics ASCR; Inst. of Thermophysics, Novosibirsk (Russian Federation)

Non-Gaussian laser beams can open new opportunities for microfabrication, including ultrashort laser direct writing. By using a model based on Maxwell’s equations, we investigate the dynamics of doughnut-shaped laser beams focused inside fused silica glass, in comparison with Gaussian pulses of the same energy. The laser propagation dynamics reveals intriguing features of beam splitting and sudden collapse toward the beam axis, overcoming the intensity clamping effect. The resulting structure of light absorption represents a very hot, hollow nanocylinder, which can lead to an implosion process that brings matter to extreme thermodynamic states. Furthermore, by monitoring the simulations of the laser beam scattering we see a considerable difference in both the blueshift and the angular distribution of scattered light for different laser energies, suggesting that investigations of the spectra of scattered radiation can be used as a diagnostic of laser-produced electron plasmas in transparent materials.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1361592
Alternate ID(s):
OSTI ID: 1341334
Report Number(s):
LLNL-JRNL-707660; JOBPDE
Journal Information:
Journal of the Optical Society of America. Part B, Optical Physics, Vol. 34, Issue 2; ISSN 0740-3224
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (44)

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