期刊
OPTICA
卷 4, 期 1, 页码 31-37出版社
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.4.000031
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资金
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- Stichting voor de Technische Wetenschappen (STW)
- Philips
- European Research Council (ERC) [290981]
- Seventh Framework Programme (FP7) [FP7-PEOPLE-2013-CIG-618229, FP7-PEOPLE-2013-CIG-630996]
- Spanish MINECO [MAT2014-53432-C5-5-R]
- Fundamental Research on Matter (FOM)
Metallic nanostructures provide a toolkit for the generation of coherent light below the diffraction limit. Plasmonic-based lasing relies on the population inversion of emitters (such as organic fluorophores) along with feedback provided by plasmonic resonances. In this regime, known as weak light-matter coupling, the radiative characteristics of the system can be described by the Purcell effect. Strong light-matter coupling between the molecular excitons and electromagnetic field generated by the plasmonic structures leads to the formation of hybrid quasi-particles known as plasmon-exciton-polaritons (PEPs). Due to the bosonic character of these quasi-particles, exciton-polariton condensation can lead to laser-like emission at much lower threshold powers than in conventional photon lasers. Here, we observe PEP lasing through a dark plasmonic mode in an array of metallic nanoparticles with a low threshold in an optically pumped organic system. Interestingly, the threshold power of the lasing is reduced by increasing the degree of light-matter coupling in spite of the degradation of the quantum efficiency of the active material, highlighting the ultrafast dynamic responsible for the lasing, i.e., stimulated scattering. These results demonstrate a unique room-temperature platform for exploring the physics of exciton-polaritons in an open-cavity architecture and pave the road toward the integration of this on-chip lasing device with the current photonics and active metamaterial planar technologies. (C) 2016 Optical Society of America
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