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First-Principes Approaches

Spontaneous emission in nanowire-based plasmonic structures

A subject of great importance in nanophotonics is the control over the spontaneous emission (SE) rate. Possible approaches in SE control include inhibition and enhancement of spontaneous emission by placing an emitter into a micro- or nano-cavity. Enhanced cavity modes can be effectively used for lasing and, upon incorporation in metallic structures, can be coupled to SPPs and thereby confined to volumes below the diffraction limit. This approach can be used to build ultra-compact lasers and spasers (generators of coherent SPPs) and allows further miniaturization of optical and optoelectronic devices.

More information: Associate Professor Vladimir Bordo

Researchgate Profile




Lasing and spasing in nanostructures

Nanowires and some other nanostructures can lase under pumping conditions. To be able to design nanolasers and optimize their operation one needs to have deep understanding of elementary optical processes which lead to lasing. However so far to describe the nanolaser action one utilizes the conventional laser equations which have been obtained for laser cavities of dimensions much larger than the laser field wavelength. This drawback can be overcome in the framework of a self-consistent lasing theory based on a Green’s function of a system. A similar theory can be developed for spasing (generation of coherent SPPs) in hybrid nanostructures. 

More information: Associate Professor Vladimir Bordo 


Funded Projects: 

Theory of Nanowire Plasmonic Lasers, FNU - Danish Council for Independent Research