%0 Journal Article
%T Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration
%+ Shanghai Key Lab of Modern Optical System
%+ Interaction Laser-Matière (ILM)
%+ Department of Physics
%+ Department of Physics
%+ Centre d'Etudes Lasers Intenses et Applications (CELIA)
%A Liu, Yi
%A Ding, Pengji
%A Ibrakovic, Neven
%A Bengtsson, Samuel N.
%A Chen, Shihua
%A Danylo, Rostyslav
%A Simpson, Emma, M.
%A Larsen, Esben, W.
%A Zhang, Xiang
%A Fan, Zhengquan
%A Houard, Aurélien
%A Mauritsson, Johan
%A L'Huillier, Anne
%A Arnold, Cord, L.
%A Zhuang, Songlin
%A Tikhonchuk, Vladimir
%A Mysyrowicz, André
%< avec comité de lecture
%@ 0031-9007
%J Physical Review Letters
%I American Physical Society
%V 119
%N 20
%P 203205
%8 2017
%D 2017
%R 10.1103/PhysRevLett.119.203205
%Z Physics [physics]/Physics [physics]/Optics [physics.optics]Journal articles
%X Nitrogen molecules in ambient air exposed to an intense near-infrared femtosecond laser pulse give rise to cavity-free superradiant emission at 391.4 and 427.8 nm. An unexpected pulse duration-dependent cyclic variation of the superradiance intensity is observed when the central wavelength of the femtosecond pump laser pulse is finely tuned between 780 and 820 nm, and no signal occurs at the resonant wavelength of 782.8 nm (2ω 782.8 nm = ω 391.4 nm). On the basis of a semiclassical recollision model, we show that an interference of dipolar moments of excited ions created by electron recollisions explains this behavior.
%G English
%2 https://hal-ensta-paris.archives-ouvertes.fr/hal-01648039/document
%2 https://hal-ensta-paris.archives-ouvertes.fr/hal-01648039/file/liu_superradiance_PhysRevLett.119.203205_2017.pdf
%L hal-01648039
%U https://hal-ensta-paris.archives-ouvertes.fr/hal-01648039
%~ CEA
%~ X
%~ ENSTA
%~ CNRS
%~ X-LOA
%~ X-DEP
%~ X-DEP-PHYS
%~ ENSTA_LOA
%~ DAM
%~ UNIV-PARIS-SACLAY
%~ X-SACLAY
%~ ENSTA-SACLAY