5 January 2017 Dark-state resonances observed on the D2 line of potassium
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Proceedings Volume 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications; 102260L (2017) https://doi.org/10.1117/12.2264223
Event: International Conference and School on Quantum Electronics "Laser Physics and Applications" - ICSQE 2016, 2016, Sozopol, Bulgaria
Abstract
We report the first observation of sub-natural-width dark resonances of enhanced transparency on the D2 line of potassium, contained in an optical cell with reduced (8mm) dimensions and buffered by 30Torr of Ne. The Potassium vapours are irradiated by a frequency modulated DFB diode laser light (with λ = 766.7nm and 2MHz bandwidth), and are placed in orthogonal to the light magnetic field scanned around zero value. Very good signal-to-noise ratio and narrow (∼20kHz) dark resonances are observed and studied in unshielded laboratory environment. The dark resonance formation is related to coherent superposition of the ground-state Zeeman sublevels by respective components of the frequency-modulated light.
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A. Krasteva, A. Krasteva, S. Gateva, S. Gateva, C. Andreeva, C. Andreeva, G. Alzetta, G. Alzetta, S. Gozzini, S. Gozzini, L. Moi, L. Moi, D. Sarkisyan, D. Sarkisyan, K. Nasyrov, K. Nasyrov, S. Cartaleva, S. Cartaleva, } "Dark-state resonances observed on the D2 line of potassium", Proc. SPIE 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications, 102260L (5 January 2017); doi: 10.1117/12.2264223; https://doi.org/10.1117/12.2264223
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