Annals of the Assembly for International Heat Transfer Conference 13

ISBN 1-56700-225-0 / CD 1-56700-226-9

Year 2006

Anisur Rahman
Mechanical Engineering Department, Polytechnic University 6 MetroTech Center, Brooklyn, NY 11201, USA

Sunil Kumar
Department of Mechanical, Aerospace and Manufacturing Engineering, Polytechnic University, 6 Metrotech Center, Brooklyn, NY 11201, USA

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.

RAD-16 pages DOI: 10.1615/IHTC13.p4.160 Download article

Article price - $35.00

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