Document Type
Article
Publication Date
5-1-1995
Publication Title
Journal of the Optical Society of America A: Optics Image Science and Vision
Abstract
The extinction efficiency for the interaction of a plane wave with a large nonabsorbing spherical particle is approximately 2.0. When a Gaussian beam of half-width w(0) is incident upon a spherical particle of radius a with w(o)/a < 1, the extinction efficiency attains unexpectedly high or low values, contrary to intuitive expectations. The reason for this is associated with the so-called compensating term in the scattered field, which cancels the field of the Gaussian beam behind the particle, thereby producing the particle's shadow. I introduce a decomposition of the total exterior field into incoming and outgoing portions that are free of compensating terms. It is then shown that a suitably defined interaction efficiency has the intuitively expected asymptotic values of 2.0 for w(o)/a >> 1 and 1.0 for w(o)/a << 1.
Repository Citation
Lock, James A., "Interpretation of Extinction in Gaussian-Beam Scattering" (1995). Physics Faculty Publications. 85.
https://engagedscholarship.csuohio.edu/sciphysics_facpub/85
Original Citation
Lock, James A. "Interpretation of Extinction in Gaussian-Beam Scattering." Journal of the Optical Society of America A: Optics Image Science and Vision 12 (1995): 929-938.
DOI
10.1364/JOSAA.12.000929
Version
Publisher's PDF
Publisher's Statement
This paper was published in Journal of the Optical Society of America A: Optics Image Science and Vision and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-12-5-929. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Volume
12
Issue
5
