Figure 11.

Profiles of the threshold modes (solid red line) and adjacent modes (dotted red lines), the distributions of injected threshold current density j_th into the active region of the laser (blue curves), and the gain within the active region (black curves), as functions of two radii, r_DBR, of the bottom DBR mirrors: 10 µm (dashed lines) and 35 µm (solid lines), and as functions of four values of the aperture radius r_A: (a) 3.0 µm; (b) 3.0 µm—an enlargement of the significant portion of gain in the active region and mode profiles; (c) 3.5 µm; (d) 3.5 µm—an enlargement of the significant portion of gain in the active region and mode profiles; (e) 4.0 µm; (f) 4.5 µm—in this case, no results are shown for mirrors with a radius of 35 µm due to the lack of lasing in continuous-wave mode.