High-angular-momentum Rydberg states in a room-temperature vapor cell for DC electric-field sensing

• URL: http://arxiv.org/abs/2310.10542v1
• Date: Mon, 16 Oct 2023 16:14:18 GMT
• Title: High-angular-momentum Rydberg states in a room-temperature vapor cell for DC electric-field sensing
• Authors: Alisher Duspayev, Ryan Cardman, David A. Anderson, Georg Raithel
• Abstract summary: We analyze Rydberg states with orbital quantum numbers $ell le 6$ using three-optical-induced transparency (EIT) and radio-frequency (RF) dressing. We discuss the principles of DC-electric-field sensing using high-$ell$ Rydberg states, and experimentally demonstrate the method using test electric fields of $lesssim$50V/m induced via photo-illumination of the vapor-cell wall.
• Score: 1.6385815610837167
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We prepare and analyze Rydberg states with orbital quantum numbers $\ell \le 6$ using three-optical-photon electromagnetically-induced transparency (EIT) and radio-frequency (RF) dressing, and employ the high-$\ell$ states in electric-field sensing. Rubidium-85 atoms in a room-temperature vapor cell are first promoted into the $25F_{5/2}$ state via Rydberg-EIT with three infrared laser beams. Two RF dressing fields then (near-)resonantly couple $25 \ell$ Rydberg states with high $\ell$. The dependence of the RF-dressed Rydberg-state level structure on RF powers, RF and laser frequencies is characterized using EIT. Furthermore, we discuss the principles of DC-electric-field sensing using high-$\ell$ Rydberg states, and experimentally demonstrate the method using test electric fields of $\lesssim$~50~V/m induced via photo-illumination of the vapor-cell wall. We measure the highly nonlinear dependence of the DC-electric-field strength on the power of the photo-illumination laser. Numerical calculations, which reproduce our experimental observations well, elucidate the underlying physics. Our study is relevant to high-precision spectroscopy of high-$\ell$ Rydberg states, Rydberg-atom-based electric-field sensing, and plasma electric-field diagnostics.

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