TY - JOUR
T1 - Effect of Gate Width on High Harmonic Generation from Polarization Gating Pulse with Longer Pulse Duration
AU - Chen , Gao
JO - Journal of Atomic and Molecular Sciences
VL - 1
SP - 26
EP - 30
PY - 2017
DA - 2017/08
SN - 8
DO - http://doi.org/10.4208/jams.050817.062317a
UR - https://global-sci.org/intro/article_detail/jams/10433.html
KW - Polarization gating pulse
KW - high-order harmonic generation
KW - attosecond pulse
AB - <p style="text-align: justify;">We simulate the high order harmonic generation (HHG) in the frequency domain and attosecond pulse in the time domain from helium atom subjected to the 
polarization gating pulse composed of the two counter-rotation circularly polarized pulses with longer pulse duration by using the strong field 
approximation model. It is found that when the width of the polarization gate is adjusted from traditional half optical cycle to one optical cycle, 
the peak position of the synthesized pulse moves to inside the gate from outside the polarization gate due to the shortening of time delay between two 
pulse peaks. As a result, harmonic spectrum with the high efficiency and the regular plateau structure can be obtained, and further a single 127-as 
pulse can be generated from the polarization gating pulse with 10-fs pulse duration.</p>