Time-domain Ramsey-narrowed sub-kHz electromagnetically induced absorption in atomic potassium

Year: 2019

Authors: Lenci Lorenzo; Marmugi Luca; Renzoni Ferruccio; Gozzini Silvia; Lucchesini Alessandro; Fioretti Andrea

Autors Affiliation: Facultad de Ingeniería, Instituto de Física, Universidad de la República, J. Herrera y Reissig 565, 11300 Montevideo, Uruguay;
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom;
Istituto Nazionale di Ottica, INO-CNR, Sede Secondaria di Pisa, Via Moruzzi 1, I-56124 Pisa, Italy.

Abstract: The use of electromagnetically induced absorption (EIA) in sensing and metrology has been thus far hindered by saturation effects, which severely degrade its linewidth. Here we propose, and experimentally demonstrate, that time-dependent Ramsey spectroscopy in potassium vapour overcomes the detrimental effect of saturation. We observe sub-kHz Ramsey fringes, with full control of the EIA resonance characteristics. Combined with the efficient optical pumping associated to the K D-1 line, the present work demonstrates an EIA scheme suitable for sensing and metrological applications.


Volume: 52 (8)      Pages from: 085002_1  to: 085002_7

More Information: This work was supported by the Royal Society International Exchanges Grant “MAGICA” (IE160163), and partially funded by the Engineering and Physical Sciences Research Council (EPSRC, EP/R011745/1).
Open Access Paper WOS:000463196500001 Article Number:085002 Published:APR 28 2019
KeyWords: electromagnetically induced absorption, Zeeman effect, line shapes and shifts, Ramsey fringes

DOI: 10.1088/1361-6455/ab0fc5

Citations: 7
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