Fig. 4: Calculation model that considers 2D electron motion and the theoretical results. | Nature Communications

Fig. 4: Calculation model that considers 2D electron motion and the theoretical results.

From: Modifying angular and polarization selection rules of high-order harmonics by controlling electron trajectories in k-space

Fig. 4

a 2D band dispersion of the first conduction band modeled by employing a cosine function. b Comparison of the band structures obtained by density-functional theory (DFT) and the model that uses a cosine band structure. The red arrow indicates the region where the electric field with E1 = 10 MV/cm is able to drive the electrons. c–h Qi(1,2) and Qi(2,1) (i = 1,2) as functions of E1 and φ calculated by using Eq. (2). i Schematic of the motion of electrons driven by a single linearly polarized laser field in k-space and real space. j Schematic for excitation with two orthogonal laser fields.

Back to article page