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Quantum erasing of laser emission in N + 2

Abstract : Cavity-free lasing of N + 2 induced by a femtosecond laser pulse at 800 nm is nearly totally suppressed by a delayed twin control pulse. We explain this surprising effect within the V-scheme of lasing without population inversion. A fast transfer of population between nitrogen ionic states X 2 Σ + g and A 2 Π u , induced by the second pulse, terminates the conditions for amplification in the system. Appearance of short lasing bursts at delays corresponding to revivals of rotational wave packets are explained along the same lines.
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Submitted on : Monday, August 31, 2020 - 8:47:27 AM
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Rostyslav Danylo, Guillaume Lambert, Y. Liu, Vladimir Tikhonchuk, Aurélien Houard, et al.. Quantum erasing of laser emission in N + 2. Optics Letters, Optical Society of America - OSA Publishing, 2020, 45 (17), pp.4670-4673. ⟨10.1364/OL.395261⟩. ⟨hal-02919116⟩

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