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Nonadiabaticity of ...
Nonadiabaticity of cavity-free neutral nitrogen lasing
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- Ding, Pengji (author)
- Lund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,University of Paris-Saclay
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- Escudero, Juan Carlos (author)
- Technical University of Madrid
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- Houard, Aurélien (author)
- University of Paris-Saclay
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- Sanchis, Alberto (author)
- Technical University of Madrid
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- Díaz Vera, Javier E. (author)
- Technical University of Madrid
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- Vicéns, Sergio (author)
- Technical University of Madrid
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- Liu, Yi (author)
- University of Shanghai for Science and Technology,University of Paris-Saclay
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- Oliva, Eduardo (author)
- Technical University of Madrid
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(creator_code:org_t)
- 2017
- 2017
- English.
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In: Physical Review A. - 2469-9926. ; 96:3
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Abstract
Subject headings
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- We report on a theoretical study of cavity-free lasing of neutral nitrogen molecules in femtosecond laser filaments with a nonadiabatic Maxwell-Bloch model, compared with recent pump-seed experiments. The nonadiabaticity of the lasing process is revealed and it is found that electron-neutral collisions dominate the dipole dephasing rate. Moreover, we show that the asymmetry between forward and backward lasing not only depends on the different amplification lengths but also on the temporal dynamics of electron-neutral collisions. The comparison of the nonadiabatic model with simulations based on the adiabatic approximation (such as radiative transfer equations) explicitly sets a bound on the validity of the latter model for cavity-free nitrogen lasing phenomenon, which holds a unique potential in optical remote sensing applications.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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