The loop-zag resonator: A loop-gap resonator design for improved sensitivity in electron-spin resonance experiments
| Autor: | Sheehan, Brendan C., Chen, Guanchu, Chauhan, Sai, McKeegan, Rilla, Arias, Francisca Abdo, Henshon, William, Collett, Charles A., Friedman, Jonathan R. |
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| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We present a novel design of loop-gap resonator, the loop-zag resonator, for sub-X-band electron-spin resonance spectroscopy. The loop-zag design can achieve improved coupling to small-sample spin systems through the improvement of sample filling factor and RF $B_1$ field. By introducing ``zags'' to the resonator's gap path, the capacitance is increased, accommodating a smaller loop size and thereby a larger filling factor to maintain the requisite resonant frequency. We present experimental spectra on five different resonators, each with approximately the same resonant frequency of $\sim2.9$~GHz, showing that an increase in the number of zags and reduction in loop size gives rise to higher sensitivity. Finite-element simulations of these resonators provide estimates of the improved filling factors obtained through the addition of zags. The frequency range over which this loop-zag design is practical enables a breadth of future applications in microwave engineering, including ESR and ESR-like quantum information microwave techniques. Comment: 6 pages, 5 figures |
| Databáze: | arXiv |
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