Amplitude and phase of light scattered by micro-scale aggregates of dielectric spheres: Comparison between theory and microwave analogy experiments

Date

2007-01-01

Author

Sabouroux, Pierre
Stout, Brian
Geffrin, Jean Michel
Eyraud, Christelle
Ayranci, Isil
Vaillon, Rodolphe
Selçuk, Nevin

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Light scattering is a useful diagnostic tool for characterization of particles. Direct scattering measurements for arbitrarily shaped micro-scale particles is difficult due to small-scale limitations. Microwave analogy is a convenient approach to realize such measurements as it enables realization of analogous experiments with larger model particles in a spectral domain where wavelengths are on centimeter scale. In the present study a test model analogous to light scattering by a micro-scale aggregate of dielectric spheres was constructed and experimentally characterized in the microwave regime. Measured amplitude and phase of the scattered field were compared with theoretical predictions obtained from quasi-exact multiple-scattering T-matrix method and discrete dipole approximation (DDA). Excellent agreement demonstrates the validities of both the experiment and the models.

Subject Keywords

Aggregate, Dielectric sphere, Microwave, Scattering, T-matrix method, DDA method, Microwave analogy

URI

https://hdl.handle.net/11511/30607

Journal

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER

DOI

https://doi.org/10.1016/j.jqsrt.2006.06.001

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

P. Sabouroux et al., “Amplitude and phase of light scattered by micro-scale aggregates of dielectric spheres: Comparison between theory and microwave analogy experiments,” JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, pp. 156–167, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30607.