Fig. 2
From: Dynamically encircling exceptional points in a three-mode waveguide system
Designed waveguides system in which exceptional points (EPs) are dynamically encircled. a Top view of the three-waveguide system with two parameters (i.e., the detuning parameter α and the absorber width w2) varying continuously along the z-axis. Waveguide-3 is set to be transparent for better readability. Symbols W, g, and L denote, respectively, the width, the gap distance, and the length of the waveguides. b Side view of the system, where h and w3 represent the height and width of the absorber attached to waveguide-3, and the three waveguides have the same height H. c The variation of α along z-axis for loop-1 and loop-2. d The variation of w2 along z-axis for loop-1 and loop-2. Input from the left- and right-hand side of the system corresponds to counter-clockwise and clockwise loops, respectively
