Fig. 2. Experimental (top two rows) and numerical (bottom two rows) demonstrations of topologically controlled THz confinement in the LN chip from L-LD though equidistant, and then to S-SD regions of the wedge-shaped SSH photonic lattice. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Fig. 2. Experimental (top two rows) and numerical (bottom two rows) demonstrations of topologically controlled THz confinement in the LN chip from L-LD though equidistant, and then to S-SD regions of the wedge-shaped SSH photonic lattice.

Caption

A, B, C, D and E correspond to locations marked in Fig. 1(b). (a1-e1) Measured spectra at the corresponding positions. (a2-e2) Energy distribution of the modes showing different confinement of the generated THz waves in the LN chip. (a3-e3) Simulated x-t diagrams showing the THz waves evolution in different regions, where (a4-e4) are the corresponding spectra. The lattice sites are illustrated by white tick marks in (a3-e3), and a in (a1, a4) is the lattice constant for the corresponding L-LD structure.

Credit

by Jiayi Wang, Shiqi Xia, Ride Wang, Ruobin Ma, Yao Lu, Xinzheng Zhang, Daohong Song, Qiang Wu, Roberto Morandotti, Jingjun Xu, Zhigang Chen

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