Double-slit interference of a relativistic vortex laser<xref rid="cpb_28_1_014702_fn1" ref-type="fn">*</xref><fn id="cpb_28_1_014702_fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11335013, 11575274, 11674339, and 61805266), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB16), the Ministry of Science and Technology of the People’s Republic of China (Grant Nos. 2016YFA0401102 and 2018YFA0404803), and the Innovation Program of the Shanghai Municipal Education Commission, China (Grant No. 201701070002E00032).</p></fn>

Double-slit interference of a relativistic vortex laser**

Project supported by the National Natural Science Foundation of China (Grant Nos. 11335013, 11575274, 11674339, and 61805266), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB16), the Ministry of Science and Technology of the People’s Republic of China (Grant Nos. 2016YFA0401102 and 2018YFA0404803), and the Innovation Program of the Shanghai Municipal Education Commission, China (Grant No. 201701070002E00032).

Zhang Hao^{1, 2}, Shen Bai-Fei^{1, 2, 3, †}, Zhang Lin-Gang^{1, ‡}

Normalized transverse intensity distribution for different lasers in the y–z plane integrated over x = 16–20 λ at t = 56 fs when the laser is transmitted. (a) Fundamental vortex laser with TC of negative sign. (b) Third vortex harmonics with TC of negative sign. (c) Fundamental Gaussian laser. (d) Third Gaussian harmonics.