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Tailored Microstructures for Infrared Detection

Published online by Cambridge University Press:  25 February 2011

Quark Y. Chen and
C. W. Bates Jr.
Quark Y. Chen
Affiliation:
Dept. of Materials Science & Engineering, Stanford University, Stanford, CA 94305
C. W. Bates Jr.
Affiliation:
Dept. of Materials Science & Engineering, Stanford University, Stanford, CA 94305
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Abstract

Using the effective medium approximation[1–4] and the theory of photoemission from small particles,[5] we look into the design-rules of infrared materials based upon the metalsemiconductor random heterostructures with Ag particles embedded in the semiconductor. It is found that semiconductor host matrices with higher dielectric constants show better optical absorption in the infrared and that optical properties are closely related to microstructural parameters such as volume fraction of metal particles, percentage of aggregation and particle size. Cu, Ag and Au particles all show similar characteristics. We synthesized materials with small silver particles embedded in Si. Their microstructures are analysized using X-ray diffraction, electron microscopy and sputter Auger profiling. Finally, we present the optical properties of these materials and make comparisons with our theoretical results.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 90: Symposium R – Materials for Infrared Detectors and Sources , 1986, 171
Copyright
Copyright © Materials Research Society 1987

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References

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