Third-harmonic generation from gold nanowires of rough surface considering classical nonlocal effect.
Third-harmonic generation from gold nanowires of rough surface considering classical nonlocal effect.
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DOI：
10.1364/oe.25.006372
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发表时间：
2017-03
期刊：
影响因子：
3.8
通讯作者：
T. Ning;Shoubao Gao;Y. Huo;Shouzhen Jiang;Cheng Yang;Jian Li;Yuefeng Zhao;B. Man
中科院分区：
文献类型：
--
作者：
T. Ning;Shoubao Gao;Y. Huo;Shouzhen Jiang;Cheng Yang;Jian Li;Yuefeng Zhao;B. Man
结果表明，与传统的局域模型相比，金属的非局域介电响应将显著提高粗糙表面金纳米线的三次谐波产生(THG)数个数量级。这种增强可能是由于非局域模型中穿透场进入金属表面的精细纳米结构所致。由于表面形貌的不均匀，也证明了各向异性三倍频效率随入射角的变化。给出了验证非局域效应对三倍频的可能途径。这些结果对解释实验观测结果具有普遍意义。
We demonstrate that the nonlocal dielectric response of metal, comparing with the traditional local model, will significantly boost the third-order harmonic generation (THG) from gold nanowires of rough surface by a factor of several orders of magnitude. The enhancement is probably due to the penetrated field into the fine nanostructures on the metal surface in nonlocal model. The anisotropy THG efficiency versus the angle of incidence is also demonstrated due to the inhomogeneous surface morphology. The possible ways to verify the nonlocal effect to the THG are demonstrated. The results have a general significance in explaining the experimental observations.