TY - JOUR
T1 - First-principles calculation of multiphoton absorption cross section of α-quartz under femtosecond laser irradiation
AU - Yu, Dong
AU - Jiang, Lan
AU - Wang, Feng
AU - Qu, Liangti
AU - Lu, Yongfeng
N1 - Funding Information:
This research is supported by the National Natural Science Foundation of China (NSFC) (Grant 91323301), National Basic Research Program of China (973 Program) (Grant 2011CB013000), and the Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Education of China (No. 708018).
Publisher Copyright:
© 2016, Springer-Verlag Berlin Heidelberg.
PY - 2016/5/1
Y1 - 2016/5/1
N2 - Time-dependent density functional theory-based first-principles calculations have been used to study the ionization process and electron excitation. The results show that the number of excited electrons follows the power law σkIk at peak intensities of I < 5 × 1013 W/cm2, indicating that the multiphoton ionization plays a key role. The multiphoton absorption cross section of α-quartz σk is further calculated to be 3.54 × 1011 cm−3 ps−1 (cm2/TW)6. Using the plasma model, the theoretical results of the damage threshold fluences are consistent with the experimental data, which validates the calculated value of multiphoton absorption cross section. By employing the calculated cross section value in the plasma model, the damage threshold fluences are theoretically estimated, being consistent with the experimental data, which validates the calculated value of multiphoton absorption cross section. The preliminary multiscale model shows great potential in the simulation of laser processing.
AB - Time-dependent density functional theory-based first-principles calculations have been used to study the ionization process and electron excitation. The results show that the number of excited electrons follows the power law σkIk at peak intensities of I < 5 × 1013 W/cm2, indicating that the multiphoton ionization plays a key role. The multiphoton absorption cross section of α-quartz σk is further calculated to be 3.54 × 1011 cm−3 ps−1 (cm2/TW)6. Using the plasma model, the theoretical results of the damage threshold fluences are consistent with the experimental data, which validates the calculated value of multiphoton absorption cross section. By employing the calculated cross section value in the plasma model, the damage threshold fluences are theoretically estimated, being consistent with the experimental data, which validates the calculated value of multiphoton absorption cross section. The preliminary multiscale model shows great potential in the simulation of laser processing.
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U2 - 10.1007/s00339-016-9922-0
DO - 10.1007/s00339-016-9922-0
M3 - Article
AN - SCOPUS:84962659945
SN - 0947-8396
VL - 122
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 5
M1 - 494
ER -