2026-04-17T00:36:31Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3774182025-07-22T14:56:27Zcom_2072_1033col_2072_452951

00925njm 22002777a 4500 dc Martín Romero, Fernando author 2022-07-19 We demonstrate an ultra-high sensitivity rf optical magnetometer based on a compact 5×5×8 mm3 Rubidium-87 vapor cell in a mu-metal shielded environment. The rf field is detected via a Faraday rotation effect on the linear polarization of a probe beam, and the resonance frequency is tuned via Zeeman effect by applying a static bias magnetic field to the cell. Sensitivities down to 3 fT/√Hz are achieved between 10 kHz and 100 kHz, which is a performance comparable to that of prior larger cells. An increase in the sensitivity with frequency and temperature has been observed. Àrees temàtiques de la UPC::Enginyeria elèctrica::Dispositius magnètics Magnetometers atomic magnetometer optical magnetometer radio-frequency sensitivity compact magnetometer tunable magnetometer Magnetòmetres A compact and tunable atomic magnetometer for femtotesla radio-frequency field detection Magnetometry using hot atomic vapors