An analysis of the influence of design parameters on the resonant frequency and Q-factor of surface transverse wave (STW) resonators

The authors present a model predicting the influence of various design parameters (geometrical dimensions, metal thickness, or groove depth) on the resonant frequency of surface transverse wave (STW) resonators. The model is based on the near-stopband approximation and the formalism of cascaded transfer matrices. Results are obtained in the case of a three-grating configuration (mirror-cavity-mirror) for both grooved and metal strip gratings. Based on simple analytical expressions, a design procedure is used, and the influence of various parameters is demonstrated and compared to already published experimental data. Experimental results obtained on metal strip quartz STW resonators are presented and discussed.<
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