Electric field sensors based on warm vapors of atoms excited to Rydberg states have distinguishing features that offer new application possibilities. A single sensor can operate over a wide spectrum of frequencies, from DC to THz, with a consistent instantaneous baseband bandwidth of approximately 10MHz. The sensor head containing the vapor is highly transparent and can also be small relative to the electric field wavelengths, enabling accurate measurements with sub-wavelength spatial resolution. Presently Rydberg sensors rely on the spectroscopic method of electromagnetically induced transparency (EIT) for preparing and probing the atoms, and though simple and effective, this places limits on the sensitivity and instantaneous bandwidth of the sensor. We numerically and experimentally investigate this limit for Doppler-broadened optically thick samples, and show the optimal EIT parameter regime. We further present recent results on new applications, such as a Rydberg-backend spectrum analyzer with field sensitivity of -145dBm/Hz and dynamic range >80 dB.
|Presenter name||Paul Kunz|
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