Fig. 3: Measured dispersions of straight/folded edge waveguides.
From: Pseudospin-polarized slow light waveguides with large delay-bandwidth product
a, b Experimental setups for scanning the EM fields inside the straight/folded edge waveguides. Experimental structures correspond to the simulated structures in Fig. 2a, d. Scale bars represent 50 mm. c, d Measured Hz fields at 1 GHz. It shows that EM waves are well confined and guided along the edges (black dashed lines). e, f Edge dispersions obtained by Fourier transforming the scanned Hz fields. Weak signals corresponding to pseudospin-down backward modes appear due to reflection at the output ends of waveguides.
