Local oscillator port integrated resonator for Rydberg atom-based electric field measurement enhancement
Bo Wu, Dunwei Liao, Zhenke Ding, Kai Yang, Yi Liu, Di Sang, Qiang An, Yunqi Fu
Abstract
Abstract Rydberg atom-based superheterodyne with additional local oscillator (LO) signal is a novel approach to detect electric field with high measured sensitivity. However, the LO signal is often supplied to the atomic vapor cell by free-space illumination, which lacks mobility and integration for practical applications. Here, we present a LO port integrated split-ring resonator for realizing high sensitivity-enhanced electric field measurements. The LO signal is sent directly to the resonator through a parallel-plate waveguide, which is shown to achieve a sensitivity enhancement of 32 dB. The integrated resonator has an electrical size of 0.088 λ and the feed port S11 reaches −38.2 dB.