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Metal slanted columnar thin film THz optical sensors

Published online by Cambridge University Press:  18 April 2012

T. Hofmann ,
D. Schmidt ,
A. Boosalis ,
P. Kühne ,
C.M. Herzinger ,
J.A. Woollam ,
E. Schubert  and
M. Schubert
T. Hofmann
Affiliation:
University of Nebraska-Lincoln, Lincoln, NE, USA.
D. Schmidt
Affiliation:
University of Nebraska-Lincoln, Lincoln, NE, USA.
A. Boosalis
Affiliation:
University of Nebraska-Lincoln, Lincoln, NE, USA.
P. Kühne
Affiliation:
University of Nebraska-Lincoln, Lincoln, NE, USA.
C.M. Herzinger
Affiliation:
J.A. Woollam Co., Lincoln, NE, USA.
J.A. Woollam
Affiliation:
J.A. Woollam Co., Lincoln, NE, USA.
E. Schubert
Affiliation:
University of Nebraska-Lincoln, Lincoln, NE, USA.
M. Schubert
Affiliation:
University of Nebraska-Lincoln, Lincoln, NE, USA.
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Abstract

We demonstrate that the anisotropic optical response of metal (cobalt) slanted columnar thin films (STF) at THz frequencies strongly depends on the dielectric properties of the dielectric ambient surrounding the slanted columnar thin films. An effective medium dielectric function approach is used to describe the combined optical response of metal slanted columnar thin film and dielectric ambient. Our observations indicate that metal (cobalt) slanted columnar thin films can be used as sensors which will enable detection and characterization of minute amounts of dielectrics at THz frequencies, such as for flow-based detection of liquid chemical constituents.

Keywords

nanostructureoptical propertiesdielectric properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1409: Symposium CC – Functional Semiconductor Nanocrystals and Metal-Hybrid Structures , 2012 , mrsf11-1409-cc13-31
Copyright
Copyright © Materials Research Society 2012

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References

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