论文标题
等离子体纳米颗粒在色散和耗散培养基中灭绝
Extinction by plasmonic nanoparticles in dispersive and dissipative media
论文作者
论文摘要
当宿主培养基具有分散和透明时，通过经典的MIE理论可以很好地理解小金属球的灭绝。然而，宿主耗散在颗粒灭绝方面的作用仍然是增强和减少对局部表面等离子体共振（LSPR）的影响之间的竞争。在这里，使用广义的MIE理论，我们详细介绍了宿主耗散对等离子纳米球的灭绝效率因子的特定影响机制。为此，我们通过将分散性和耗散宿主与其透明的对应物进行比较来隔离耗散效应。结果，我们确定了宿主耗散对LSPR的阻尼效应，包括谐振和振幅降低。共振位置通过宿主耗散转移，这无法通过经典的Fröhlich条件来预测。最后，我们证明，由于宿主耗散引起的宽频段灭绝增强可以从LSPR的位置上实现。
Extinction of small metallic spheres has been well understood through the classical Mie theory when the host medium is dispersive and transparent. However, the role of host dissipation on the particulate extinction remains a competition between the enhancing and reducing effects on the localized surface plasmonic resonance (LSPR). Here, using a generalized Mie theory, we elaborate on the specific influence mechanisms of host dissipation on the extinction efficiency factors of a plasmonic nanosphere. To this end, we isolate the dissipative effects by comparing the dispersive and dissipative host with its transparent counterpart. As a result, we identify the damping effects of host dissipation on the LSPR including the resonance widening and amplitude reducing. The resonance positions are shifted by host dissipation, which cannot be predicted by the classical Fröhlich condition. Finally, we demonstrate that a wide-band extinction enhancement due to host dissipation can be realized away from the positions of LSPR.
