Gozzini, S;
Lucchesini, A;
Marinelli, C;
Marmugi, L;
Gateva, S;
Tsvetkov, S;
Cartaleva, S;
(2016)
Transformation of electromagnetically induced transparency into absorption in a thermal potassium optical cell with spin preserving coating.
Journal of Physics: Conference Series
, 700
(1)
, Article 012051. 10.1088/1742-6596/700/1/012051.
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Abstract
We report a new experimental approach where an order of magnitude enhancement of the electromagnetically induced absorption (EIA) resonance contrast, thus making it similar to that of the EIT resonance contrast is observed under the same conditions. The EIA signal results from the interaction of a weak probe beam with a ground state that has been driven by the pump (counter-propagating) beam. Probe absorption spectra are presented where the laser frequency is slowly detuned over the D 1 line of 39 K vapor contained in a cell with a PDMS antirelaxation coating. In addition to the frequency detuning, a magnetic field orthogonal to the laser beams is scanned around zero value at a higher rate. With both laser beams linearly polarized, an EIT resonance is observed. However, changing the pump beam polarization from linear to circular reverses the resonance signal from EIT to EIA.
| Type: | Article |
|---|---|
| Title: | Transformation of electromagnetically induced transparency into absorption in a thermal potassium optical cell with spin preserving coating |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1742-6596/700/1/012051 |
| Publisher version: | http://dx.doi.org/10.1088/1742-6596/700/1/012051 |
| Language: | English |
| Additional information: | Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (http://creativecommons.org/licenses/by/3.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices 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-pp.ucl.ac.uk/id/eprint/1478179 |
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