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International Heat Transfer Conference 13
Graham de Vahl Davis (open in a new tab) School of Mechanical and Manufacturing Engineering, University of New South Wales, Kensington, NSW, Australia
Eddie Leonardi (open in a new tab) Computational Fluid Dynamics Research Laboratory, School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052

ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

AN ASYMPTOTIC APPROACH FOR RADIATION RESONANCE IN DIELECTRIC MICROSPHERES

page 10
DOI: 10.1615/IHTC13.p4.160
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SINOPSIS

In this paper radiation resonances in microspheres are characterized both theoretically and experimentally by considering the fact that the size parameter (pi times diameter divided by wavelength of light) of the microspheres is very large at optical wavelengths. Asymptotic expressions have been developed based on electromagnetic theory derivations at the large size parameter limits. The resulting expressions are very simple and can be used to characterize resonances in dielectric microspheres. The theoretical development is significantly less complicated than existing approaches presented in the literature. The theoretical results are validated by experimental data obtained via this study using a tunable semiconductor laser and from the literature. The solutions are shown to be very accurate for large size parameters. The quality factor of experimental resonance spectra observed in the laboratory is calculated as 3.9×104 which is sensitive enough to detect micro or nano scale changes.

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