Fig. 12
Some nonlinear optical effects in Weyl semimetals. a Direct detection of light orbital angular momentum. b, c Second harmonic generation. b Setup scheme. c Second harmonic signal as a function of incident polarization angle. d Inverse Faraday effect. e, f High harmonic generation. e Scheme. f High harmonic spectrum. Figures are reproduced with permission from a Ref. [9], Copyright 2020 American Association for the Advancement of Science; b, c Ref. [11], Copyright 2017 Springer Nature; d Ref. [239]; e, f Ref. [240]