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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 33 — Nov. 20, 2007
  • pp: 8118–8133

Optical constants of silica glass from extreme ultraviolet to far infrared at near room temperature

Rei Kitamura, Laurent Pilon, and Miroslaw Jonasz  »View Author Affiliations

Applied Optics, Vol. 46, Issue 33, pp. 8118-8133 (2007)

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We thoroughly and critically review studies reporting the real (refractive index) and imaginary (absorption index) parts of the complex refractive index of silica glass over the spectral range from 30 nm to 1000 μ m . The general features of the optical constants over the electromagnetic spectrum are relatively consistent throughout the literature. In particular, silica glass is effectively opaque for wavelengths shorter than 200 nm and larger than 3.5 4.0 μ m . Strong absorption bands are observed (i) below 160 nm due to the interaction with electrons, absorption by impurities, and the presence of OH groups and point defects; (ii) at 2.73 2.85 , 3.5, and 4.3 μ m also caused by OH groups; and (iii) at 9 9.5 , 12.5, and 21 23 μ m due to Si―O―Si resonance modes of vibration. However, the actual values of the refractive and absorption indices can vary significantly due to the glass manufacturing process, crystallinity, wavelength, and temperature and to the presence of impurities, point defects, inclusions, and bubbles, as well as to the experimental uncertainties and approximations in the retrieval methods. Moreover, new formulas providing comprehensive approximations of the optical properties of silica glass are proposed between 7 and 50 μ m . These formulas are consistent with experimental data and substantially extend the spectral range of 0.21 7 μ m covered by existing formulas and can be used in various engineering applications.

© 2007 Optical Society of America

OCIS Codes
(110.5220) Imaging systems : Photolithography
(160.4670) Materials : Optical materials
(160.4760) Materials : Optical properties
(160.6030) Materials : Silica
(290.3030) Scattering : Index measurements
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:

Original Manuscript: July 30, 2007
Manuscript Accepted: August 31, 2007
Published: November 19, 2007

Rei Kitamura, Laurent Pilon, and Miroslaw Jonasz, "Optical constants of silica glass from extreme ultraviolet to far infrared at near room temperature," Appl. Opt. 46, 8118-8133 (2007)

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