Minimum Line Width of Surface Plasmon Resonance in Doped ZnO Nanocrystals,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Minimum Line Width of Surface Plasmon Resonance in Doped ZnO Nanocrystals
Nano Letters ( IF 9.6 ) Pub Date : 2017-12-05 00:00:00 , DOI: 10.1021/acs.nanolett.7b03605
Christophe Delerue ₁

Affiliation

The optical response of ZnO nanocrystals (NCs) doped with Al (Ga) impurities is calculated using a model that incorporates the effects of quantum confinement, dielectric mismatch, surface, and ionized impurity scattering. For dopant concentrations of a few percent, the NC polarizability is dominated by a localized surface plasmon resonance (LSPR) in the infrared (IR) which follows the Drude-Lorentz law for NC diameter above ∼10 nm but is strongly blue-shifted for smaller diameters due to quantum confinement effects. The intrinsic width of the LSPR peak is calculated in order to characterize plasmon losses induced by ionized impurity scattering. Widths below 80 meV are found in the best cases, in agreement with the lowest values recently measured on single NCs. These results confirm that doped ZnO NCs are very promising for the development of IR plasmonics. The width of the LSPR peak strongly increases when dopants are placed near the surface of the NCs or when additional fixed charges are present.

中文翻译：

掺杂的ZnO纳米晶体中表面等离子体共振的最小线宽

掺杂有Al（Ga）杂质的ZnO纳米晶体（NCs）的光学响应是使用一个模型来计算的，该模型结合了量子限制，介电失配，表面和电离杂质散射的影响。对于浓度为百分之几的掺杂剂，NC极化率主要由红外（IR）中的局部表面等离振子共振（LSPR）决定。对于高于10 nm的NC直径，其遵循Drude-Lorentz定律，但是对于较小的NC直径会发生强烈的蓝移由于量子限制效应而产生的直径。计算LSPR峰的固有宽度是为了表征由离子化杂质散射引起的等离激元损耗。在最佳情况下，发现低于80 meV的宽度与最近在单个NC上测得的最低值是一致的。这些结果证实，掺杂的ZnO NCs对于IR等离子体技术的发展非常有前途。当将掺杂物放置在NC的表面附近或存在其他固定电荷时，LSPR峰的宽度会大大增加。

更新日期：2017-12-05

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南