Periodic dielectric structures, such as Bragg reflectors and photonic band-gap crystals, are used to localize electromagnetic modes. A key parameter for electromagnetic resonators is the quality factor, Q. For conventional Bragg reflectors, losses occur predominantly in the first few reflectors and one of the materials usually has a low dielectric loss tangent. By varying the individual dimensions of the reflecting elements, a significant improvement in the Q-factor can be obtained. We verify this by constructing and measuring proof-of-principle microwave resonators.

Topics
Electrical properties and parameters, Electrical energy, Maxwell equations, Electromagnetic spectrum, Microwave frequencies, Radiowave and microwave technology, Dielectric properties, Photonic crystals, Mathematical optimization, Weak interactions
© 2011 American Institute of Physics.
2011
American Institute of Physics
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