Fig. 6
From: Nonreciprocal responses from non-centrosymmetric quantum materials

Second-harmonic generation (SHG) in TaAs. a Schematic of the SHG experimental setup. b SHG intensity as a function of angle of incident polarization at 20 K. c Color plot of the momentum-resolved contribution to the SHG for a model for a simplified mode for TaAs. d The photon-energy dependence of SHG for a simplified model. Figures from ref80. Reprinted with persmission from Nature Publishing Group