Dependence of Q Factor on Surface Roughness in a Plasmonic Cavity
We investigated surface-roughness-dependent optical loss in a plasmonic cavity consisting of asemiconductor nanodisk/silver nanopan structure. Numerical simulations show that the quality factors ofplasmonic resonant modes significantly depend on the surface roughness of the dielectric-metal interfac...
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| Veröffentlicht in: | Current optics and photonics 2016, 20(1), , pp.188-191 |
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| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | eng |
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| Online-Zugang: | Volltext |
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| Zusammenfassung: | We investigated surface-roughness-dependent optical loss in a plasmonic cavity consisting of asemiconductor nanodisk/silver nanopan structure. Numerical simulations show that the quality factors ofplasmonic resonant modes significantly depend on the surface roughness of the dielectric-metal interfacein the cavity structure. In the transverse-magnetic-like whispering-gallery plasmonic mode excited in astructure with disk diameter of 1000 nm, the total quality factor decreased from 260 to 130 with increasingroot-mean-square (rms) surface roughness from 0 to 5 nm. This quantitative theoretical study shows thatthe smooth metal surface plays a critical role in high-performance plasmonic devices. KCI Citation Count: 2 |
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| ISSN: | 2508-7266 2508-7274 |