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Thierry Ruchon's research topic is focused on attosecond physics. In brief, they develop new generation and analysis schemes to synthetize attosecond light pulses, i.e. light pulses whose duration are in the 10 -18 s range. These pulses are necessarily in the XUV region of the spectrum, where most of the optical elements no longer work (even air absorbs in this region). Moreover, they cover an ultra broad spectrum, typically several times the total width of the visible spectrum. This makes their synthesis and characterization challenging, and a current hot research subject.
In the lab, they focus on the upconversion of intense visible femtosecond lasers in gases through the so-called High Harmonic Generation (HHG) process. Basic information on attosecond pulse generation is available in this lecture. In particular, they pay a lot of attention to the measurement of the phase properties of the emitted light, especially to the spectral phase. This is achieved through quantum interferometry of electronic wave packets together with optical interferometry in the XUV. He also investigate the generation of attosecond pulses carrying either or both Spin and orbital angular momenta.
These studies have two types of uses. First, one gains information on the gas used for the generation. It is therefore an Extreme Non Linear Spectroscopy. Second, they may be used to perform time resolved XUV spectroscopy with attosecond resolution.
Thierry Ruchon's research topic is focused on attosecond physics. In brief, they develop new generation and analysis schemes to synthetize attosecond light pulses, i.e. light pulses whose duration are in the 10 -18 s range. These pulses are necessarily in the XUV region of the spectrum, where most of the optical elements no longer work (even air absorbs in this region). Moreover, they cover an ultra broad spectrum, typically several times the total width of the visible spectrum. This makes their synthesis and characterization challenging, and a current hot research subject.
In the lab, they focus on the upconversion of intense visible femtosecond lasers in gases through the so-called High Harmonic Generation (HHG) process. Basic information on attosecond pulse generation is available in this lecture. In particular, they pay a lot of attention to the measurement of the phase properties of the emitted light, especially to the spectral phase. This is achieved through quantum interferometry of electronic wave packets together with optical interferometry in the XUV. He also investigate the generation of attosecond pulses carrying either or both Spin and orbital angular momenta.
These studies have two types of uses. First, one gains information on the gas used for the generation. It is therefore an Extreme Non Linear Spectroscopy. Second, they may be used to perform time resolved XUV spectroscopy with attosecond resolution.
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High-Brightness Sources and Light-Driven Interactions Congress (2024)
Mauro Fanciulli,David Bresteau, J. Gaudin,Shuo Dong,Romain Géneaux,Thierry Ruchon, O. Tcherbakoff, J. Minář, O. Heckmann, Maria Richter, K. Hricovíni,Samuel Beaulieu
Physical Review Lettersno. 6 (2023)
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Guer Matthieu,Luttmann Martin,Vimal Mekha,Hergott Jean-François, Zelaquett Khoury Antonio,Hernández-García Carlos,Pisanty Emilio,Ruchon Thierry
EPJ Web of Conferences (2023): 11005-11005
PHYSICAL REVIEW Ano. 5 (2023)
S. Dobosz Dufrénoy,Thierry Ruchon,Henri Vincenti,David Bresteau, P. Monot,Hugo J. B. Marroux,Romain Géneaux,K. Hricovíni, P. Salières
Photoniquespp.40-45, (2023)
Physical review lettersno. 6 (2023): 066402
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