Figure 2From: Gain studies of 1.3-μm dilute nitride HELLISH-VCSOA for optical communicationsStructure of HELLISH-VCSOA and refractive index profile and electric field intensity distribution. (a) Schematic diagram to illustrate the structure of simple-bar HELLISH-VCSOA for light emission; (b) the refractive index profile and distribution of the electric field intensity across the sample.Back to article page