Modeling the directed transmission and reflection enhancements of the lasing spaser in active metamaterials

Details Modeling the directed transmission and reflection enhancements of the lasing spaser in active metamaterials Modeling the directed transmission and reflection enhancements of the lasing spaser in active metamaterials

2009-12-11

arxiv.org/abs/0912.2139v1

Phys. Rev. B 80, 235116 (2009)

Physics

Optics

20papges, 5 figures, http://dsl.nju.edu.cn/mpp

Scientific paper

Simultaneously enhanced reflectance and transmittance greater than 35 dB are demonstrated for the lasing spaser (or spasing) behavior in an active fishnet metamaterial. In mimicking a lasing cavity, an equivalent active slab with Lorentz dispersion for the index of refraction is established to model the spasing metamaterial through the Fabry-Perot effect. Numerical and theoretical results show good agreement in the equal enhancement of reflectance and transmittance, as well as the non-monotonic dependence of the spasing intensity on the gain coefficient. In addition, directed emission of the spasing beam is verified numerically.

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