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. 2023 Aug 16;9(33):eadh2353. doi: 10.1126/sciadv.adh2353

Fig. 4. All-optically switchable SH signal.

Fig. 4.

(A) Measured second-harmonic (SH) signal for P = 29 mW and P = 30 mW, below and above threshold, respectively. (B) SH signal versus input power at 0 V for x-polarized incident light. At threshold power P = 30 mW, SH signal is abruptly enhanced because of optically induced phase transition. (C) SH signal versus input power at 5 V for x-polarized incident light. A slight step-like increment is observed near 30 mW at nematic-to-isotropic (N-I) phase transition. SHG, second-harmonic generation; I-N, isotropic-to-nematic.