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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 7 — Apr. 1, 2009
  • pp: 992–994

Generalized ellipsometry for monoclinic absorbing materials: determination of optical constants of Cr columnar thin films

D. Schmidt, B. Booso, T. Hofmann, E. Schubert, A. Sarangan, and M. Schubert  »View Author Affiliations


Optics Letters, Vol. 34, Issue 7, pp. 992-994 (2009)
http://dx.doi.org/10.1364/OL.34.000992


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Abstract

Generalized spectroscopic ellipsometry is used to determine the form-induced birefringence and monoclinic optical constants of chromium columnar thin films. The slanted nanocolumns were deposited by glancing angle deposition under 85° incidence and are tilted from the surface normal. Dichroism measured for wavelengths from 400 to 1000 nm renders the Cr nanocolumns monoclinic absorbing crystals with c axis along the nanocolumns axis, b axis parallel to the film interface, and 74.8° monoclinic angle between a and c axes. The columnar thin film reveals anomalous optical dispersion, extreme birefringence, and strong dichroism and differs entirely from bulk chromium.

© 2009 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(160.1190) Materials : Anisotropic optical materials
(160.4236) Materials : Nanomaterials
(240.2130) Optics at surfaces : Ellipsometry and polarimetry

ToC Category:
Optics at Surfaces

History
Original Manuscript: December 19, 2008
Manuscript Accepted: February 15, 2009
Published: March 20, 2009

Citation
D. Schmidt, B. Booso, T. Hofmann, E. Schubert, A. Sarangan, and M. Schubert, "Generalized ellipsometry for monoclinic absorbing materials: determination of optical constants of Cr columnar thin films," Opt. Lett. 34, 992-994 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-7-992

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