Fig. 1. Structural diagram of TG surface plasmon enhanced LED

Fig. 2. Structural diagram of QSOW

Fig. 3. Influence of TG parameters on transmittance. (a) Duty cycle; (b) period; (c) thickness

Fig. 4. Structure diagram of AOW

Fig. 5. Absorptivities under different incident angles. (a) QSOW; (b) AOW

Fig. 6. Electric field distributions of different structures. (a) QSOW; (b) AOW

Fig. 7. Electric field distribution of GaN LED. (a) GaN LED with QSOW; (b) GaN LED with AOW;(c) normal GaN LED

Fig. 8. GaN LEDs with different structures. (a) GaN LED with AOW; (b) normal GaN LED