Fig. 1. Controlling emission rates of emitters by cavity and the categories of cavity

Fig. 2. Spontaneous emission enhancement in micro- or nano-photonic structures ^{［25，28，30，34，36，37，55，57，58］}

Fig. 3. Inhibition and enhancement of the SE of QDs in PhC nanostructures ^{［13，43，59，61］}

Fig. 4. Different tuning mechanisms of PhC cavity mode and self-assembled quantum dots ^{［68-70，72］}

Fig. 5. Controlling spontaneous emission by vacuum field modulation ^［11］

Fig. 6. Controlling stimulated emission by modulated pumping ^{［89，90，93，94，96，97］}

Fig. 7. Controlling stimulated emission by coupled double-cavities ^{［103-108］}

Fig. 8. Mode selection in PhC lasers based on coupled double-heterostructure cavities ^［109］

Fig. 9. Enhancement of nonlinearity effects in PhC coupled-cavities structures ^{［121，122］}

Fig. 10. Transverse PT-symmetric lasers and longitudinal PT-symmetric lasers ^{［132-137，139］}