Whispering-gallery modes in shielded hemispherical dielectric resonators

The results of the numerical and experimental investigations of whispering-gallery (WG) modes in shielded hemispherical dielectric resonators are presented in this paper. It is shown that the Q factor of WG modes in the shielded resonator can be ten times much higher than the Q factor of the similar...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2002-11, Vol.50 (11), p.2647-2649
Main Authors: Eremenko, Z.E., Filipov, Y.F., Kharkovsky, S.N., Kutuzov, V.V., Kogut, A.E.
Format: Article
Language:English
Subjects:
Dielectric losses
Dielectrics
Hemispheres
Laser modes
Mathematical models
Microwave devices
Microwaves
Millimeter wave technology
Optical resonators
Optical sensors
Permittivity
Q factors
Reflectors
Resonant frequency
Resonators
Shields
Tellurium
Whispering gallery modes
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Summary:The results of the numerical and experimental investigations of whispering-gallery (WG) modes in shielded hemispherical dielectric resonators are presented in this paper. It is shown that the Q factor of WG modes in the shielded resonator can be ten times much higher than the Q factor of the similar open hemispherical dielectric-resonator modes. Shielding the resonator can decrease the dimensions of both the dielectric hemisphere and resonator as a whole, saving the high-Q factor of WG modes. The usage of a cylindrical shield and local flat reflectors in the experiment provides the investigation of the high-Q factor of WG modes in the resonator.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2002.804627