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arXiv · 1106.3002

Low-threshold directional plasmon lasing assisted by spatially coherent surface plasmon polaritons

Yang Cao·Zeyong Wei·Wei Li·Anan Fang·Hongqiang Li·Xunya Jiang·Hong Chen·C. T. Chan
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Abstract

We theoretically propose directional, low-threshold plasmon lasing in both the near-infrared and visible wavelengths by utilizing spatially coherent surface plasmon polaritons on a meta-surface. The gain strength required for threshold lasing can be tuned down to a large extent through compatible structural parameters. Our calculations show that no more than 65 cm$^{-1}$ at 193.5 THz (1.55 $μ$m) or 267 cm$^{-1}$at 474THz (0.633 $μ$m) of gain coefficient is sufficient to compensate for the dissipation of metal films for threshold lasing; these values are smaller than any reported studies at the same frequencies. These findings present a planar solid-state route for plasmon lasing that is highly efficient and spatially coherent.

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Yang Cao, Zeyong Wei, Wei Li, Anan Fang, Hongqiang Li, Xunya Jiang, Hong Chen, C. T. Chan. 2011-06-08. Low-threshold directional plasmon lasing assisted by spatially coherent surface plasmon polaritons. https://arxiv.org/abs/1106.3002

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