Gozzini, S;
Fioretti, A;
Lucchesini, A;
Marmugi, L;
Marinelli, C;
Tsvetkov, S;
Gateva, S;
(2017)
Tunable and Polarization-Controlled High-Contrast Bright and Dark Coherent Resonances in Potassium.
Optics Letters
, 42
(15)
pp. 2930-2933.
10.1364/OL.42.002930.
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Abstract
We demonstrate high-contrast electromagnetically induced absorption (EIA) bright resonances on the D1 line of 39K with characteristics comparable to those of the electro- magnetically induced transparency (EIT) dark resonances observed in the same conditions. EIA is produced by the interaction of a weak probe beam with the atomic ground state driven in a degenerate coherent superposition by either a co- or counter-propagating pump beam. We have obtained an order of magnitude increase of the EIA’s contrast with respect to previous similar experiments, performed with other alkalis, without compromising its linewidth. Furthermore, we show that the magneto-optic resonances can be continuously tuned from EIT to EIA by changing the relative handedness of circular polariza- tions of pump and probe beams, or depending on whether they co- or counter-propagate. This opens new perspectives in the use of EIA in a broad range of physical domains and in a large wealth of potential applications in optics and photonics.
| Type: | Article |
|---|---|
| Title: | Tunable and Polarization-Controlled High-Contrast Bright and Dark Coherent Resonances in Potassium |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1364/OL.42.002930 |
| Publisher version: | https://www.osapublishing.org/ol/abstract.cfm?uri=... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Coeherent optical effects, Line shapes and shifts, Zeeman effect |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1565525 |
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