Fig. 4: Experimental observation in the trivial lattice. | Nature Communications

Fig. 4: Experimental observation in the trivial lattice.

From: Non-Hermitian route to higher-order topology in an acoustic crystal

Fig. 4: Experimental observation in the trivial lattice.

a Photo of one unit cell for the trivial lattice. b Simulated eigenfrequencies for the trivial sample with 12 resonators along x and y directions. c Measured spectra for the sample in (a). Red, yellow, and blue lines represent the spectra measured in one of resonators within the corner, edge, and bulk regions, respectively. d Measured intensity profile around the spectra peak denoted by the black dashed line in (c).

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