Fig. 1. Schematic diagram of UV-LD standard structure and new structures

Fig. 2. L-I-V characteristic curves of standard structure and three new structures

Fig. 3. Lasing spectra of four structures at current of 800 mA

Fig. 4. Energy band diagram of standard structures at current of 800 mA

Fig. 5. Energy band diagram of new structure C at current of 800 mA

Fig. 6. (a) Electron current density and (b) hole current density of four structures at current of 800 mA

Fig. 7. Stimulated recombination rates of four structures at current of 800 mA