Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration

Yi Liu, Pengji Ding, Neven Ibrakovic, Samuel Bengtsson, Shihua Chen, Rostyslav Danylo, Emma R. Simpson, Esben W. Larsen, Xiang Zhang, Zhengquan Fan, Aurélien Houard, Johan Mauritsson, Anne L'Huillier, Cord L. Arnold, Songlin Zhuang, Vladimir Tikhonchuk, André Mysyrowicz

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

Sammanfattning

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 (2ω782.8 nm=ω391.4 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.

Originalspråkengelska
Artikelnummer203205
TidskriftPhysical Review Letters
Volym119
Nummer20
DOI
StatusPublished - 2017 nov. 17

Ämnesklassifikation (UKÄ)

  • Atom- och molekylfysik och optik (Här ingår: Kemisk fysik, kvantoptik)

Fingeravtryck

Utforska forskningsämnen för ”Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration”. Tillsammans bildar de ett unikt fingeravtryck.

Citera det här