Dense pair plasma generation and its modulation dynamics in counter-propagating laser field<xref rid="cpb_27_10_105202fn1" ref-type="fn">*</xref><fn id="cpb_27_10_105202fn1"><label>*</label><p>Project supported by the National Basic Research Program of China (Grant No. 2013CBA01504), the National Natural Science Foundation of China (Grant Nos. 11347028, 11405083, and 11675075), the Natural Science Foundation of Hunan Province, China (Grant No. 2018JJ2315), and the Youth Talent Projectof Hunan Province, China (Grant No. 2018RS3096).</p></fn>

Dense pair plasma generation and its modulation dynamics in counter-propagating laser field**

Project supported by the National Basic Research Program of China (Grant No. 2013CBA01504), the National Natural Science Foundation of China (Grant Nos. 11347028, 11405083, and 11675075), the Natural Science Foundation of Hunan Province, China (Grant No. 2018JJ2315), and the Youth Talent Projectof Hunan Province, China (Grant No. 2018RS3096).

Liu Wei-Yuan^{1, 2}, Luo Wen^{1, †}, Yuan Tao^{2, 3}, Yu Ji-Ye^{2, 3}, Chen Min^{2, 3, ‡}

(color online) (a) Energy spectra of target electrons (red), positrons (blue), and BW-electrons (black). The inset shows the corresponding γ-ray spectrum. Laser intensity of 4 × 10²³ W/cm² and target electron density of 280n_c are used. (b) Energy spectra of positrons recorded by two incident lasers with intensities of 1 × 10²³ W/cm² (black), 4 × 10²³ W/cm² (red), and 8 × 10²³ W/cm² (blue), illuminating thin foil with density n_e = 280n_c. All these data are taken from the same moment of t = 13.25T₀.