Laser processing of poly(methyl methacrylate) Lambertian diffusers

Daniel-Dennis Bubb, Sunyong Yi, John Kuchmek, Jeffrey Corgan, Michael Papantonakis

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Abstract

Matrix-assisted pulsed laser deposition was used to deposit poly(methyl methacrylate) on silicon wafers and sodium silicate glass slides for the purpose of making optical diffusers. After deposition, the reflectance of the coated substrates was measured as a function of scattering angle. We found that the angular dependence of the reflectance could be described as the sum of two functions. First, a Gaussian describes the specular reflection of the underlying substrate that has been broadened by passage through the film. Second, a cosine function describes the reflectance contribution from the film itself. We found that by increasing the thickness of the deposited film that we could eliminate the specular reflection to obtain Lambertian diffusers. Since we can control the surface roughness by adjusting the ratio of the two matrices in laser processing, this deposition technique offers the possibility of producing a wide range of diffusers of different types.

Original languageEnglish (US)
Pages (from-to)22-24
Number of pages3
JournalApplied Surface Science
Volume257
Issue number1
DOIs
Publication statusPublished - Oct 15 2010

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All Science Journal Classification (ASJC) codes

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

Keywords

  • Diffusers
  • MAPLE
  • Matrix-assisted pulsed laser evaporation
  • PMMA, Thin films
  • Processing

Cite this

Bubb, D-D., Yi, S., Kuchmek, J., Corgan, J., & Papantonakis, M. (2010). Laser processing of poly(methyl methacrylate) Lambertian diffusers. Applied Surface Science, 257(1), 22-24. https://doi.org/10.1016/j.apsusc.2010.06.015