Fig. 8
From: Spontaneous emission in micro- or nanophotonic structures
SE enhancement based on gap SPP structures. a Schematic of gold bowtie nanoantenna with molecules (black arrows) as emitters [16]. b Radiative (red) and nonradiative (green) enhancement factors of structure (a) along the center of the gap [16]. c Schematic of metal-dielectric-metal (MDM) gap plasmon slab structure [240]. d Spontaneous emission enhancement for a MDM structure with different gap sizes [240]. e Schematic diagram of gap-plasmon-based CQED system [245]. f Time-resolved fluorescence measurements for the structure (e)[245]. g Decay rate for the structure (e) with different photonic channels [245]. h Schematic of a silver nanocube situated on a gold film [246]. i Distribution of enhancement of spontaneous emission rate for the structure (h) [246]. j Schematic diagram of silver nanorod-coupled gold nanofilm gap plasmon system with a designed nanofiber [20]. k Purcell factors for different emission paths for the structure (j) with emitter within the nano gap [20]