Rydberg atom-based field sensing enhancement using a split-ring resonator

Abstract

We investigate the use of a split-ring resonator (SRR) incorporated with an atomic-vapor cell to improve the sensitivity and the minimal detectable electric (E) field of Rydberg atom-based sensors. In this approach, a sub-wavelength SRR is placed around an atomic vapor-cell filled with cesium atoms for E-field measurements at 1.3 GHz. The SRR provides a factor of 100 in the enhancement of the E-field measurement sensitivity. Using electromagnetically induced transparency (EIT) with Aulter-Townes splitting, E-field measurements down to 5 mV/m are demonstrated with the SRR, while in the absence of the SRR, the minimal detectable field is 500 mV/m. We demonstrate that by combining EIT with a heterodyne Rydberg atom-based mixer approach, the SRR allows for the a sensitivity of 5.5 µV/m √ Hz, which is two-orders of magnitude improvement in sensitivity than when the SRR is not used. FIG. 1. Vapor cell place inside the split-ring resonator (SRR). The insert shows the dimension of the SRR.

TV and Video Game Streaming with a Quantum Receiver: A Study on a Rydberg atom-based receivers bandwidth and reception clarity

“…This is possible since Rydberg states are highly sensitive to electric fields and depending on the Rydberg state used, allow for detecting fields ranging from DC to THz. They have been used for the detection of electric fields for AM/FM (and phase modulation) receivers 2-9 , spectrum analyzers 10 , voltage standards 11 , angle-of-arrival 12 , and many more applications [13][14][15][16][17] . These sensors even allow for calibrated measurements traceable to the international system of units (SI) 18 for both electrical and radio frequency power [19][20][21][22] .…”