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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Floch, Jean-Michel Le
in Cooperation with on an Cooperation-Score of 37%
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Publications (7/7 displayed)
- 2015Discovery of iron group impurity ion spin states in single crystal Y2SiO5 with strong coupling to whispering gallery photonscitations
- 2014Intercomparison of Permittivity Measurement Techniques for Ferroelectric Thin Layerscitations
- 2011Microwave properties of semi-insulating silicon carbide between 10 and 40 GHz and at cryogenic temperaturescitations
- 2010Detrapping and retrapping of free carriers in nominally pure single crystal GaP, GaAs, and 4H–SiC semiconductors under light illumination at cryogenic temperaturescitations
- 2009Observation of persistent photoconductivity and modified permittivity in bulk gallium arsenide and gallium phosphide samples at cryogenic temperatures
- 2008Characterization of materials and mode structure of high-Q resonators using Bragg confined modes
- 2008Modified permittivity observed in bulk gallium arsenide and gallium phosphide samples at 50 K using the whispering gallery mode methodcitations
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document
Characterization of materials and mode structure of high-Q resonators using Bragg confined modes
Abstract
This paper describes the design and mode structure of resonators using Bragg confined modes. We investigate a range of low-loss dielectric materials with aim to maximize the Q-factor. The structure is composed of a hollow dielectric cylinder with the mode confined in the central low-loss region. We illustrate the importance of material permittivity and show it is possible to obtain a better Q-factor using higher permittivity materials with larger intrinsic dielectric losses than single crystal sapphire. Also we illustrate the discovery of a new type of Bragg confined mode in a dielectric loaded cavity. The dielectric is placed in a silver platted copper cavity. A resonance was observed at 13.4 GHz with an unloaded Q-factor of order 2×10, which is more than a factor of six above the dielectric loss limit. Usually a Bragg structure requires a pure Transverse Electric mode with no azimuthal variations and only an electric field component, Eθ, while this mode possesses a number of azimuthal variations greater than zero.