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) Differential probabilities P₁(E, θ_k) of electrons ionized along θ = 0 and θ = π for (a) ξ = 0 and (b) ξ = 1.5. The transform-limited laser pulse has central carrier frequency ω₀ = 25 eV, CEP ϕ₀ = 0.5π, intensity I₀ = 1 × 10¹⁵ W/cm², and duration τ₀ = T₀ = 2π/ω₀.