Interference Femtosecond Linear and Nonlinear Comb-Spectroscopy in Octave Expanded Range

Pulkin, S. A.; Borisov, E. N.; Kalinichev, Alexey A.; Korshok, I.K.; Venediktov, Dmitrii; Pulkin, N.S.; Venediktov, Vladimir Yu.; Balabas, M. V.; Shoev, Vladislav; Uvarova, S. V.; Иванов, Д. А.; Ivanova, T. Yu.; Savel'eva, S.

doi:10.1007/978-3-030-05974-3_15

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2020

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Collective radiation effects in rubidium vapor beyond the yoked superradiance

Pulkin

Korshok

Kalinichev

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

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It is known that being pumped with infrared light an ensemble of Rb atoms can demonstrate an upconversion and re-emit blue light at 420 nm. In pulsed regime this radiation can be enhanced by collective effects, which is called yoked superradiance. Here we demonstrate that not only the blue-light emission is affected by collective effects, but also the red light scattering. This becomes possible due to the coupling between different non-diagonal elements of the atomic density matrix. We develop a simple self-consistent model of the coupled atom-field system and numerically simulate its dynamics. We test the sensitivity of blue- and red-light pulse profiles on the density of Rb atoms and the background gas pressure.

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