Figure 7
From: Effect of gallium environment on infrared emission in Er3+-doped gallium– antimony– sulfur glasses

Schematic illustration of structure evolution with increasing of Ga and Er3+ ions concentration in host glasses.
From: Effect of gallium environment on infrared emission in Er3+-doped gallium– antimony– sulfur glasses
Schematic illustration of structure evolution with increasing of Ga and Er3+ ions concentration in host glasses.