Imperial College London
Alternate

ProfessorMishaIvanov

Faculty of Natural Sciences, Department of Physics

Chair-Theoretical Attosec Sci/Ultraf Quantum Coher
 
 
 
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Contact

 

+44 (0)20 7594 9719m.ivanov

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Matthews:2018:10.1038/s41567-018-0105-0,
author = {Matthews, M and Morales, F and Patas, A and Lindinger, A and Gateau, J and Berti, N and Hermelin, S and Kasparian, J and Richter, M and Bredtmann, T and Smirnova, O and Wolf, J-P and Ivanov, M},
doi = {10.1038/s41567-018-0105-0},
journal = {Nature Physics},
pages = {695--700},
title = {Amplification of intense light fields by nearly free electrons},
url = {http://dx.doi.org/10.1038/s41567-018-0105-0},
volume = {14},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Light can be used to modify and control properties of media, as in the case of electromagnetically induced transparency or, more recently, for the generation of slow light or bright coherent extreme ultraviolet and X-ray radiation. Particularly unusual states of matter can be created by light fields with strengths comparable to the Coulomb field that binds valence electrons in atoms, leading to nearly free electrons oscillating in the laser field and yet still loosely bound to the core1,2. These are known as Kramers–Henneberger states3, a specific example of laser-dressed states2. Here, we demonstrate that these states arise not only in isolated atoms4,5, but also in rare gases, at and above atmospheric pressure, where they can act as a gain medium during laser filamentation. Using shaped laser pulses, gain in these states is achieved within just a few cycles of the guided field. The corresponding lasing emission is a signature of population inversion in these states and of their stability against ionization. Our work demonstrates that these unusual states of neutral atoms can be exploited to create a general ultrafast gain mechanism during laser filamentation.
AU  - Matthews,M
AU  - Morales,F
AU  - Patas,A
AU  - Lindinger,A
AU  - Gateau,J
AU  - Berti,N
AU  - Hermelin,S
AU  - Kasparian,J
AU  - Richter,M
AU  - Bredtmann,T
AU  - Smirnova,O
AU  - Wolf,J-P
AU  - Ivanov,M
DO  - 10.1038/s41567-018-0105-0
EP  - 700
PY  - 2018///
SN  - 1745-2473
SP  - 695
TI  - Amplification of intense light fields by nearly free electrons
T2  - Nature Physics
UR  - http://dx.doi.org/10.1038/s41567-018-0105-0
UR  - https://rdcu.be/bU1W7
VL  - 14
ER  -
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