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Applied Optics

Applied Optics


  • Vol. 43, Iss. 36 — Dec. 20, 2004
  • pp: 6648–6655

Millimeter-Wavelength Investigation of Fibrous Aerosol Absorption and Scattering Properties

Charles W. Bruce, Al V. Jelinek, Sheng Wu, Sharhabeel Alyones, and Qingsong Wang  »View Author Affiliations

Applied Optics, Vol. 43, Issue 36, pp. 6648-6655 (2004)

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The measurements here are used to examine agreement with a recently developed theory for long-wavelength fibrous aerosol attenuative properties (extinction and components absorption, scattering). This is intended to be the final phase of a long and systematic examination of the theory’s key features. In this case the parameters are high conductivities coupled with a broad range of fiber diameters. It is clear that there is a limit on the extinction efficiency or effective extinction cross section per unit fiber volume. This limit is represented by the fiber diameter of translucency, that is, the diameter at which the fiber is not completely opaque to the electromagnetic energy. The transition is approximated by the classical skin depth of the fiber. Above this diameter the peak extinction efficiency decreases with an increase in diameter at approximately the same rate for all conductors. The scattering resonance producing this peak becomes stronger as the diameter increases. Our data confirm that for fiber diameters below the skin depth the character of the attenuation is that of absorption.

© 2004 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(160.4760) Materials : Optical properties
(230.7370) Optical devices : Waveguides
(260.2110) Physical optics : Electromagnetic optics
(290.1350) Scattering : Backscattering
(350.4010) Other areas of optics : Microwaves

Charles W. Bruce, Al V. Jelinek, Sheng Wu, Sharhabeel Alyones, and Qingsong Wang, "Millimeter-Wavelength Investigation of Fibrous Aerosol Absorption and Scattering Properties," Appl. Opt. 43, 6648-6655 (2004)

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  1. P. C. Waterman and J. C. Pedersen, “Electromagnetic scattering and absorption by finite wires,” J. Appl. Phys. 78, 656–667 (1995).
  2. P. C. Waterman and J. C. Pedersen, “Scattering by finite wires of arbitrary epsilon, mu and sigma,” J. Opt. Soc. Am. A 15, 174–184 (1998).
  3. K. P. Gurton and C. W. Bruce, “Parametric study of the absorption cross section for a moderately conducting thin cylinder,” Appl. Opt. 34, 2822–2828 (1995).
  4. K. P. Gurton and C. W. Bruce, “Measured backscatter from conductive thin films deposited on fibrous substrates,” IEEE Trans. Antennas Propag. 46, 1674–1678 (1998).
  5. M. Hart and C. W. Bruce, “Backscatter measurements of thin nickel-coated graphite fibers,” IEEE Trans. Antennas Propag. 48, 842–843 (2000).
  6. C. W. Bruce, D. R. Ashmore, P. C. Pittman, N. E. Pedersen, J. C. Pedersen, and P. C. Waterman, “Attenuation at a wavelength of 0.86 ccm due to fibrous aerosols,” Appl. Phys. Lett. 56, 791–792 (1990).
  7. A. V. Jelinek and C. W. Bruce, “Extinction spectra of high conductivity fibrous aerosols,” J. Appl. Phys. 78, 2675–2678 (1995).
  8. C. T. Tai, “Electromagnetic backscattering from cylindrical wires,” J. Appl. Phys. 23, 909–916 (1952).
  9. C. W. Bruce, A. V. Jelinek, R. M. Halonen, M. J. Stehling, J. C. Pedersen, and P. C. Waterman, “Millimeter wavelength attenuation efficiencies of fibrous aerosols,” J. Appl. Phys. 74, 3688–3691 (1993).
  10. A. V. Jelinek and C. W. Bruce, “Absorption by moderately conducting fibrous aerosols at millimeter wavelengths,” Appl. Opt. (to be published).
  11. A. Miller, New Mexico State University, Las Cruces, N. Mex., 88003 (personal communication, 2003).

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