Fig. 1. Geometry of waveguide. (a) Two dimensional profile of waveguide; (b) three dimensional geometry of waveguide

Fig. 2. Electric field distribution of two-dimensional model for waveguide structure. (a) Normalized electric field distribution of the fundamental mode (r=90 nm, rc=5 nm); (b) normalized electric field distribution along horizontal dashed line in Fig. (a); (c) normalized electric field distribution along vertical dashed line in Fig. (a)

Fig. 3. Variation of ANSF、LSPP、FM and FP in waveguide structure with rc. (a) ANSF; (b) LSPP; (c) FM; (d) FP

Fig. 4. Simulation result of the nanolaser. (a) 3D simulation result of nanolaser; (b) field intensity distribution of x-z cross section

Fig. 5. Variation of gain threshold and quality factor of the laser with different rc. (a) Quality factor Q; (b) gain threshold gth

Fig. 6. Change of effective mode volume Veff with rc

Fig. 7. Emission spectrum of nanolaser