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Proceedings Paper

Infrared ellipsometric measurement of biological films at air/ZnS interfaces
Author(s): Clayton S.-C. Yang; Avishai Ben-David; Alan C. Samuels
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Paper Abstract

Knowledge of the optical properties of the biological spores in air is essential to the development of remote sensing capabilities of biological aerosols. Recently Developed Mid-Infrared (2 to 33 μm) Variable Angle Spectroscopic Ellipsometry has been used to evaluate the optical properties of composite bacterial Spores thin films at Air/ZnS Interfaces. Bacterial-spores thin films was studied in attempt to determine the optical constants of biological spores and the appropriate dielectric Effective Medium Theories that well describe these composite systems. It is shown most of the spores lying down on the interfaces. We compared the optical constants of an individual bacterial spore calculated from the ellipsometric data and a number of static and dynamic dielectric Effective Medium Theory models that considering the effects of sizes, shapes, and electrical and magnetic dipole interactions of the spores. These measurements and assessments show the validity of the models in describing the optical properties of the bacterial-spore composite materials.

Paper Details

Date Published: 14 September 2006
PDF: 10 pages
Proc. SPIE 6331, Linear and Nonlinear Optics of Organic Materials VI, 63310R (14 September 2006); doi: 10.1117/12.680511
Show Author Affiliations
Clayton S.-C. Yang, Battelle East Science and Technology Ctr (United States)
Avishai Ben-David, Edgewood Chemical Biological Ctr. (United States)
Alan C. Samuels, Edgewood Chemical Biological Ctr. (United States)

Published in SPIE Proceedings Vol. 6331:
Linear and Nonlinear Optics of Organic Materials VI
Robert A. Norwood, Editor(s)

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