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Related Experiment Videos

High-reflectivity HfO2/SiO2 ultraviolet mirrors.

Philippe Torchio1, Alexandre Gatto, Marco Alvisi

  • 1Institut Fresnel, Unité Mixte de Recherche, Centre National de la Recherche Scientifique, Ecole National Supérieure de Physique de Marseille, Domaine Universitaire de St Jérĵme, France. philippe.torchio@fresnel.fr

Applied Optics
|June 18, 2002
PubMed
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High-reflectivity ultraviolet mirrors were created using advanced deposition techniques. Hafnium dioxide and silicon dioxide coatings achieved nearly 99% reflectance near 250 nm, ideal for UV applications.

Area of Science:

  • Materials Science
  • Optics
  • Thin Film Technology

Background:

  • Developing high-performance optical coatings is crucial for ultraviolet (UV) applications.
  • Dense multilayer coatings require precise deposition methods to achieve desired optical properties.

Purpose of the Study:

  • To produce high-reflectivity dense multilayer coatings for the UV spectral region.
  • To characterize optical properties of HfO2 and SiO2 single layers and UV mirrors.
  • To present optical constants for HfO2 and SiO2 relevant to UV mirror fabrication.

Main Methods:

  • Thin-film single layers and UV mirrors were deposited using ion plating and plasma ion-assisted deposition.
  • Optical characterization techniques were employed to evaluate the performance of the coatings.

Related Experiment Videos

  • Optical constants for HfO2 and SiO2 were determined from single-layer measurements.

    • Main Results:

    • High-reflectivity dense multilayer coatings were successfully produced for the UV spectral region.
    • Optical constants for HfO2 and SiO2 were obtained and presented.
    • Hafnium dioxide (HfO2) and silicon dioxide (SiO2) mirrors achieved approximately 99% reflectance near 250 nm.

    Conclusions:

    • Ion plating and plasma ion-assisted deposition are effective high-energy technologies for fabricating UV optical coatings.
    • The characterized HfO2 and SiO2 materials are suitable for creating high-reflectivity UV mirrors.
    • Achieved reflectance levels demonstrate the potential of these coatings for demanding UV optical systems.