Fig. 2: Analysis of mode homogeneity in cavity with DDirac = 6, NDefect = 3.
From: Topological quantum cascade laser with Dirac-scaled valley edge modes
a FESEM image with dashed colored boxes highlighting the position of the defect sites within the cavity, while the black triangular dashed lines indicate the boundary of the scaled waveguide. b Magnified image for a clearer view of the defect sites within the device. The color of the dashed outline around each picture indicates its respective position in part a of the figure, while the black dashed lines indicate the boundary of the scaled waveguide. c Simulated result of normalized E-Field within the cavity. The boundary of the waveguide is highlighted by white dashed lines. d Experimentally measured spectral emissions of the device operating at 0.43 kA/cm2. Measurements made without any cover plate is plotted in black, while emissions from individual defect are plotted in their respective color highlighted in part a of the figure.
