Fig. 4: Experimental demonstration of chiral transmission.
From: Chiral transmission by an open evolution trajectory in a non-Hermitian system
a SEM image of the device. b–d Zoom-in SEM images bounded by the rectangles are marked with yellow lines in (a), numbered by 1, 2 and 3, respectively. e Theoretical, simulated and experimental transmittance versus Γ at 1550 nm. The symbols ○ and × represent the simulated and experimental transmittance with different lengths L2 = 13, 53, 93 μm. f, g Simulated (f) and experimental (g) transmittance spectra for the output ports over the wavelength range of 1500–1600 nm and 1530–1580 nm, respectively, with L2 = 93 μm
