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Axially open nonradiative structures: An example of single-mode resonator based on the sample holder
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10.1063/1.1986989
/content/aip/journal/rsi/76/8/10.1063/1.1986989
http://aip.metastore.ingenta.com/content/aip/journal/rsi/76/8/10.1063/1.1986989
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Top view of a cylindrical NR dielectric resonator with inner radius and outer radius . The excitation waveguide is shown. (b) Cross-section view of a planar mirrors NR dielectric resonator. The distance between the mirrors is indicated with . (c) Cross-section view of a possible axially open NR dielectric resonator. The shaded line represents the plane of symmetry of the structure.

Image of FIG. 2.
FIG. 2.

Chart of the allowed dielectric and geometrical conditions for the mode of an axially open NR resonator. The curves represent the conversion factor vs the normalized aspect ratio, as obtained for the structure of Fig. 1(b). The shaded area indicates the conditions in which the mode of the structure of Fig. 1(c) can leak axially. The dashed line represents the conversion factor of the mode of an ideal aluminum cavity, calculated assuming the optimal aspect ratio .

Image of FIG. 3.
FIG. 3.

(Color online) Picture of the axially open configuration employed in the measurements. The active volume is given by the part of the Suprasil® capillary comprised between the two mirrors.

Image of FIG. 4.
FIG. 4.

Normalized spectrum of the resonator of Fig. 3. (a) Normalization obtained displacing the resonating device with respect to the feeding waveguide. (b) Normalization obtained removing the dielectric tube. The assignment of each resonance signal is indicated.

Image of FIG. 5.
FIG. 5.

Normalized spectrum obtained displacing the dielectric tube, as shown in the inset.

Image of FIG. 6.
FIG. 6.

Normalized spectrum obtained in the configuration of Fig. 3, after a decrease of the distance between the mirrors.

Image of FIG. 7.
FIG. 7.

Detail of the resonances reported in Figs. 4–6, together with their Lorentzian fit.

Image of FIG. 8.
FIG. 8.

(Color online) Section of the axially open NR resonator investigated with the finite element method. The shaded area indicates the dielectric region. The unit length is expressed in millimeters.

Image of FIG. 9.
FIG. 9.

(Color online) Computed azimuthal electric field of the mode, together with the geometry of analysis. On the right the colors scale, expressed in arbitrary units. The unit length on the axes is expressed in millimeters.

Image of FIG. 10.
FIG. 10.

(Color online) Computed azimuthal electric field of the mode, together with the geometry of analysis. On the right the colors scale, expressed in arbitrary units. The unit length on the axes is expressed in millimeters.

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/content/aip/journal/rsi/76/8/10.1063/1.1986989
2005-07-21
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Axially open nonradiative structures: An example of single-mode resonator based on the sample holder
http://aip.metastore.ingenta.com/content/aip/journal/rsi/76/8/10.1063/1.1986989
10.1063/1.1986989
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