Fig. 4: Band-structure analysis.
From: Resonator embedded photonic crystal surface emitting lasers
a The measured band structure of the REPCSEL at I = 0.4 × Ith. The black dotted lines show the simulated band structure. b The corresponding electroluminescence(EL) spectra at the Γ2-point. c The measured band structure at I = 1.2 × Ith. The degenerate band edges (A & B) and nondegenerate band edges (C & D) are highlighted. d The maximum optical intensity of the band edges as a function of drive current. The optical intensity of modes (A&B) was plotted x5 for ease of comparison.
