TY - UNPB
T1 - XUV yield optimization of two-color high-order harmonic generation in gases
AU - Raab, Ann-Kathrin
AU - Redon, Melvin
AU - Roscam Abbing, Sylvianne
AU - Fang, Yuman
AU - Guo, Chen
AU - Smorenburg, Peter
AU - Mauritsson, Johan
AU - Viotti, Anne-Lise
AU - Lhuillier, A
AU - Arnold, Cord
PY - 2024/10/29
Y1 - 2024/10/29
N2 - We perform an experimental two-color high-order harmonic generation study in argon with the fundamental of an ytterbium ultrashort pulse laser and its second harmonic. The intensity of the second harmonic and its phase relative to the fundamental are varied, in a large range compared to earlier works, while keeping the total intensity constant. We extract the optimum values for the relative phase and ratio of the two colors which lead to a maximum yield enhancement for each harmonic order in the extreme ultraviolet spectrum. Within the semi-classical three-step model, the yield maximum can be associated with a flat electron return time vs. return energy distribution. An analysis of different distributions allows to predict the required relative two-color phase and ratio for a given harmonic order, total laser intensity, fundamental wavelength, and ionization potential.
AB - We perform an experimental two-color high-order harmonic generation study in argon with the fundamental of an ytterbium ultrashort pulse laser and its second harmonic. The intensity of the second harmonic and its phase relative to the fundamental are varied, in a large range compared to earlier works, while keeping the total intensity constant. We extract the optimum values for the relative phase and ratio of the two colors which lead to a maximum yield enhancement for each harmonic order in the extreme ultraviolet spectrum. Within the semi-classical three-step model, the yield maximum can be associated with a flat electron return time vs. return energy distribution. An analysis of different distributions allows to predict the required relative two-color phase and ratio for a given harmonic order, total laser intensity, fundamental wavelength, and ionization potential.
U2 - 10.48550/arXiv.2410.21997
DO - 10.48550/arXiv.2410.21997
M3 - Preprint (in preprint archive)
BT - XUV yield optimization of two-color high-order harmonic generation in gases
PB - arXiv.org
ER -