Predicting internal microwave Mie resonances in aqueous spheroids with a standing-wave approach

Yuchen Song; Miao Hu; Aaron D. Slepkov

doi:10.1117/12.3000578

11 March 2024 Predicting internal microwave Mie resonances in aqueous spheroids with a standing-wave approach

Yuchen Song, Miao Hu, Aaron D. Slepkov

Proceedings Volume 12885, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVII; 128850U (2024) https://doi.org/10.1117/12.3000578
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Despite its low index of refraction at visible wavelengths, water exhibits a large complex index of refraction at 2.5 GHz. As such, cm-scale aqueous objects like grapes and hydrogel beads are resonant in microwave radiation, showing the expected sequence of spherical Mie scattering modes. We expand our study to aqueous spheroids, where analytical prediction of resonant sizes and shapes are considerably more difficult to make. We show that 3D standing-wave solutions accurately predict certain fundamental microwave Mie resonances in both oblate and prolate spheroids, and we compare this conceptually and mathematically-simplified approach with results obtained using FEM simulations.

Conference Presentation

Citation Download Citation

Yuchen Song, Miao Hu, and Aaron D. Slepkov "Predicting internal microwave Mie resonances in aqueous spheroids with a standing-wave approach", Proc. SPIE 12885, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVII, 128850U (11 March 2024); https://doi.org/10.1117/12.3000578

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