Parametric investigation of laser nanoimprinting of hemispherical cavity arrays

L. P. Li, Y. F. Lu, D. W. Doerr, D. R. Alexander, X. Y. Chen

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


A monolayer of self-assembled silica particles can be imprinted into a silicon substrate by laser irradiation (KrF excimer laser, λ=248 nm). Periodical hemispherical cavities can be therefore created on the substrate surface. The influences of various particle sizes and laser fluence were investigated. In addition, preheating of the substrate significantly improves the performance. One-dimensional thermal calculation was employed to understand the thermal effect in this process. Three-dimensional optical simulation provided an accurate insight into the light intensity enhancement. Raman spectroscopy was used to examine the stress induced by the laser imprinting process resided in the cavity structures.

Original languageEnglish (US)
Pages (from-to)5144-5151
Number of pages8
JournalJournal of Applied Physics
Issue number9
StatePublished - Nov 1 2004

ASJC Scopus subject areas

  • General Physics and Astronomy


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