Above-threshold ionization of hydrogen atom in chirped laser fields<xref rid="cpb_27_7_073203fn1" ref-type="fn">*</xref> <fn id="cpb_27_7_073203fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11664035, 11465016, 11764038, 11364038, and 11564033).</p> </fn>

Above-threshold ionization of hydrogen atom in chirped laser fields* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 11664035, 11465016, 11764038, 11364038, and 11564033).

Ni Yuan-Yuan¹, Zhao Song-Feng^{1, †}, Li Xiao-Yong², Wang Guo-Li¹, Zhou Xiao-Xin¹

(color online) Chirp dependence of (a) photoelectron energy spectra; (b), (c) photoelectron angular distributions at different photoelectron energies of E = 2U_p and E = 3U_p, respectively; (d) total population of excited bound states of H. We consider three different chirp rates, i.e., ξ = −1.73 (solid), ξ = 0 (dashed), and ξ = 1.73 (dot-dashed).