High-order harmonic generation of Li<sup>+</sup> with combined infrared and extreme ultraviolet fields<xref rid="cpb_27_7_073205fn1" ref-type="fn">*</xref> <fn id="cpb_27_7_073205fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11465016, 11664035, 11764038, and 11765018) and the Foundation of Northwest Normal University, China (Grant No. NWNU-LKQN-17-1).</p> </fn>

High-order harmonic generation of Li⁺ with combined infrared and extreme ultraviolet fields* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 11465016, 11664035, 11764038, and 11765018) and the Foundation of Northwest Normal University, China (Grant No. NWNU-LKQN-17-1).

Wang Li, Wang Guo-Li^†, Jiao Zhi-Hong, Zhao Song-Feng, Zhou Xiao-Xin^‡

HHG spectra of Li⁺ generated by single 800-nm IR laser and two-color IR+XUV pulse for two phase delays of (a) 0° and (b) 75°. The peak intensity of IR is 2.5 × 10¹⁵ W/cm² in all cases, while XUV intensity is determined by three α values of 10³, 10⁴, and 10⁵. Here, α = I_XUV/I_IR is the ratio between XUV and IR peak intensities. The central wavelength of XUV pulse corresponds to the 73th harmonic of the fundamental 800 nm wavelength.