TY - JOUR
T1 - Effect of two-color laser pulse duration on intense terahertz generation at different laser intensities
AU - Lu, Chenhui
AU - He, Tao
AU - Zhang, Liqiang
AU - Zhang, Hui
AU - Yao, Yunhua
AU - Li, Shufen
AU - Zhang, Shian
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/12/30
Y1 - 2015/12/30
N2 - We study theoretically terahertz generation in two-color laser-gas interactions based on a transient photocurrent model. We show that terahertz generation depends on the laser pulse duration and intensity of the two-color laser field. Furthermore, the terahertz amplitude increases with an increase of the laser pulse duration at low laser intensity, but decreases with an increase of the laser pulse duration at high laser intensity. Our analysis shows that the ionization events play an important role in terahertz generation and the terahertz amplitude is determined by the superposition of contributions from individual ionization events.
AB - We study theoretically terahertz generation in two-color laser-gas interactions based on a transient photocurrent model. We show that terahertz generation depends on the laser pulse duration and intensity of the two-color laser field. Furthermore, the terahertz amplitude increases with an increase of the laser pulse duration at low laser intensity, but decreases with an increase of the laser pulse duration at high laser intensity. Our analysis shows that the ionization events play an important role in terahertz generation and the terahertz amplitude is determined by the superposition of contributions from individual ionization events.
UR - https://www.scopus.com/pages/publications/84953267405
U2 - 10.1103/PhysRevA.92.063850
DO - 10.1103/PhysRevA.92.063850
M3 - 文章
AN - SCOPUS:84953267405
SN - 1050-2947
VL - 92
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
M1 - 063850
ER -