“…The interaction of high-power ultra-intense lasers and structured (both nanostructured [1][2][3][4][5][6][7] and microstructured [8][9][10][11][12][13][14][15][16][17][18] ) targets has been a topic of great interest for its capability of enhancing the laser energy conversion efficiency 1 , high-order harmonics generation 19,20 , charged particles (relativistic electrons and ions 3,4,18 ) acceleration and the production of X-ray 1,[21][22][23] to γ-ray 15,16,24 radiation. The produced charged particle and photon beams have a wide range of applications from medical ion therapy 25,26 , nuclear physics 27,28 to photon-photon pair production [29][30][31] .…”