Fig. 4: Dynamic 3D information reconstruction based on wavelength-temperature joint modulation.

a In our scheme, the dynamical projections of 3D objects at SH wave are realized by tuning the crystal temperature and the input wavelength. The incident fundamental light is vertical polarization and output SH wave is the horizontally polarization. The z-axis is along the optical axis of LiNbO₃ crystal. b–d The experimental results. At the initial state (i.e., 900 nm and 45 °C), two arrows present at different propagation depths of SH waves. In the middle state (i.e., 975 nm and 45 °C), the SH patterns become a square and a triangle at different distances. At the end state (i.e., 975 nm and 350 °C), two arrows present again except that their locations are different from those in (b).