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Recollision-Induced Superradiance of Ionized Nitrogen Molecules

Abstract : We propose a new mechanism to explain the origin of optical gain in the transitions between the excited and ground states of the ionized nitrogen molecule following irradiation of neutral nitrogen molecules with an intense ultrashort laser pulse. An efficient transfer of population to the excited state is achieved via field-induced multiple recollisions. We show that the proposed excitation mechanism must lead to a superradiant emission, a feature that we confirm experimentally.
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Submitted on : Thursday, September 24, 2015 - 5:33:29 PM
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Yi Liu, Pengji Ding, Guillaume Lambert, Aurélien Houard, Vladimir Tikhonchuk, et al.. Recollision-Induced Superradiance of Ionized Nitrogen Molecules. Physical Review Letters, American Physical Society, 2015, 115, pp.133203. ⟨10.1103/PhysRevLett.115.133203⟩. ⟨hal-01204958⟩



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