Figure 3
From: Coupling the normal incident light into waveguide modes of DBR mirrors via a diffraction grating

The numerically calculated field patterns of TE polarized waves at 553 nm, 542 nm, 527 nm, 508 nm, 487 nm, 467 nm, and 451 nm, respectively.
The modes are the fundamental waveguide mode to 6th order waveguide mode, respectively.