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Conferences > AOIPM > 1996 > OPC > OPC383

Electromagnetic Resonances in Low Density Collections of Dielectric Spheres

M. Stoytchev, N. Garcia, and A. Z. Genack

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Abstract

The diffusion coefficient D and the transport mean free path ℓ of microwave radiation have been measured in random collections of 0.95 cm diameter alumina spheres at a volume filling fraction of 0.06. Both parameters show sharp resonances as the frequency is tuned. From the measured values of D and ℓ the transport velocity vE has been calculated. Values of vE as small as 1/5 of the speed of light in vacuum are observed.

© 1996 Optical Society of America

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