Spontaneous evolution of nanotips on silicon surface below the laser ablation threshold

S. Lugomer, A. Maksimović, A. Karacs, G. Peto

Research output: Article

2 Citations (Scopus)

Abstract

A low power density single-pulse laser irradiation of the Si surface has been used for the study of formation and self-organization of silicon nanotips. A two dimensional regular array of hillock-like nanotips has been created in the central region, a disturbed array comprising crossed lines of hillocks in the near-central region, and the "V"-shaped array in the peripheral region. Therefore, the long-range organization of hillocks changes from the center toward the periphery, following the Gaussian-like laser power profile. The evolution of hillocks due to the flow instability of molten silicon is equivalent to the instability of a liquid layer falling down a vertical plate. The novel result is that the hillock-like soliton structures can be identified with the lump solitons resulting from the nonlinear hydrodynamic instability evolution.

Original languageEnglish
Pages (from-to)7851-7855
Number of pages5
JournalApplied Surface Science
Volume257
Issue number17
DOIs
Publication statusPublished - jún. 15 2011

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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