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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 7 — Apr. 2, 2007
  • pp: 4351–4358

Experimental method for reliably establishing the refractive index of buprestid beetle exocuticle

J. A. Noyes, P. Vukusic, and I. R. Hooper  »View Author Affiliations

Optics Express, Vol. 15, Issue 7, pp. 4351-4358 (2007)

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In this study we apply an existing optical characterisation technique to establish reliably the complex refractive indices of layers comprising a natural multilayer reflector in the beetle Chrysochroa raja. Its reflector characteristics, ultrastructure and layer thicknesses were established using electron and optical microscopy. We recorded a significant number of wavelength dependent optical data sets from the same regions of sample using both linear polarisations and from a variety of different angles. These optical data sets were modelled simultaneously in order to significantly reduce the degeneracy of the fitting process. For the C. raja sample in question, the fitted complex refractive indices of both layer types were determined to be n=1.68 k=0.03 and n=1.55 k=0.14.

© 2007 Optical Society of America

OCIS Codes
(310.3840) Thin films : Materials and process characterization
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Thin Films

Original Manuscript: November 17, 2006
Revised Manuscript: February 9, 2007
Manuscript Accepted: February 24, 2007
Published: April 2, 2007

Virtual Issues
Vol. 2, Iss. 5 Virtual Journal for Biomedical Optics

J. A. Noyes, P. Vukusic, and I. R. Hooper, "Experimental method for reliably establishing the refractive index of buprestid beetle exocuticle," Opt. Express 15, 4351-4358 (2007)

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