Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration
(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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https://lup.lub.lu.se/record/f0227917-9cee-49a2-b009-0d6f6cd9bb1c
- author
- organization
- publishing date
- 2017-11-17
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 119
- issue
- 20
- article number
- 203205
- publisher
- American Physical Society
- external identifiers
-
- wos:000415604000003
- pmid:29219339
- scopus:85034647532
- 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
- 2024-08-05 10:09:47
@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>}}, 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}}, doi = {{10.1103/PhysRevLett.119.203205}}, volume = {{119}}, year = {{2017}}, }