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

Liu, Yi LU ; Ding, Pengji LU ; Ibrakovic, Neven LU ; Bengtsson, Samuel LU ; Chen, Shihua; Danylo, Rostyslav; Simpson, Emma R. LU ; Larsen, Esben W. LU ; Zhang, Xiang and Fan, Zhengquan, et al. (2017) In Physical Review Letters 119(20).
Abstract

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.

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published
subject
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Physical Review Letters
volume
119
issue
20
publisher
American Physical Society
external identifiers
  • scopus:85034647532
  • wos:000415604000003
ISSN
0031-9007
DOI
10.1103/PhysRevLett.119.203205
language
English
LU publication?
yes
id
f0227917-9cee-49a2-b009-0d6f6cd9bb1c
date added to LUP
2017-12-08 07:45:28
date last changed
2018-01-16 13:27:11
@article{f0227917-9cee-49a2-b009-0d6f6cd9bb1c,
  abstract     = {<p>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.</p>},
  articleno    = {203205},
  author       = {Liu, Yi and Ding, Pengji and Ibrakovic, Neven and Bengtsson, Samuel and Chen, Shihua and Danylo, Rostyslav and Simpson, Emma R. and Larsen, Esben W. and Zhang, Xiang and Fan, Zhengquan and Houard, Aurélien and Mauritsson, Johan and L'Huillier, Anne and Arnold, Cord L. and Zhuang, Songlin and Tikhonchuk, Vladimir and Mysyrowicz, André},
  issn         = {0031-9007},
  language     = {eng},
  month        = {11},
  number       = {20},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.119.203205},
  volume       = {119},
  year         = {2017},
}