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Proceedings Paper

Diamondlike Carbon For Infrared Optics
Author(s): Bhola N. De; S. Orzeszko; John A. Woollam; David C. Ingram; A. J. McCormick
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Paper Abstract

Diamondlike Carbon (DLC), also known as amorphous hydrogenated carbon (or a:C-H), is a hard semitransparent material. Since it is amorphous and has no grain boundaries, it is proposed for use as a coating on infrared optical surfaces to protect them from the envi-ronmentally adverse chemicals such as the acids, salt water, etc., as well as particle impact. Moisture penetration studies of DLC, usicgthe Variable Angle Spectroscopic Ellipsometry (VASE), have been presented elsewhere 194'. In this paper, we first briefly mention sample preparation, done using various combinations of RF power and gas pressure in a plasma deposition chamber. Then, results of using an ultraviolet-visible (UV-VIS) absorbance spectrometer are presented. From the absorbance we calculated the band gap using the Tauc plots, and found values ranging from 0.2 to 1.25eV, depending on deposition condition. Secondly, a series of DLC samples were prepared using a Kaufman type ion beam deposition system. Using VASE, we have studied these samples after bombarding them with various fluences of Fl, and analyzed the data using two Lorentz oscillators to represent the optical properties. We have also shown the correlation between the optical properties and the amount of hydrogen present within the samples, as measured by proton recoil experiments.

Paper Details

Date Published: 17 January 1989
PDF: 6 pages
Proc. SPIE 0969, Diamond Optics, (17 January 1989); doi: 10.1117/12.948141
Show Author Affiliations
Bhola N. De, The University of Nebraska-Lincoln (United States)
S. Orzeszko, The University of Nebraska-Lincoln (United States)
Nicholas Copernicus University (Poland)
John A. Woollam, The University of Nebraska-Lincoln (United States)
David C. Ingram, Universal Energy Systems (United States)
Whickham Ion Beam Systems, Ltd. (United Kingdom)
A. J. McCormick, Universal Energy Systems (United States)

Published in SPIE Proceedings Vol. 0969:
Diamond Optics
Albert Feldman; Sandor Holly, Editor(s)

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