Role of the dressed and bound states on below-threshold harmonic generation of He atom

Zhou Jian-Wei, Jiao Zhi-Hong^†, Li Peng-Cheng^‡, Zhou Xiao-Xin^§

The BTHG spectra (a) of He in laser pulse with wavelength 425 nm, intensity 1.4×10¹⁴ W/cm², and SST (b) analysis.