Spectral and temporal modulations of femtosecond SPP wave packets induced by resonant transmission/reflection interactions with metal-insulator-metal nanocavities.
Spectral and temporal modulations of femtosecond SPP wave packets induced by resonant transmission/reflection interactions with metal-insulator-metal nanocavities.
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DOI：
10.1364/oe.27.022582
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发表时间：
2019-04
期刊：
影响因子：
3.8
通讯作者：
Naoki Ichiji;Yuka Otake;A. Kubo
中科院分区：
文献类型：
--
作者：
Naoki Ichiji;Yuka Otake;A. Kubo
为了研究纳米尺度金属-绝缘体-金属（MIM）结构的动态光相互作用，利用飞秒表面等离子体激元（SPP）波包在MIM结构表面传播. SPP-腔相互作用的共振性质被反映为透射和反射SPP波包的光谱中的强调制，其分别显示峰和谷，对应于MIM腔的本征模。这些特征表明MIM结构充当法布里-珀罗标准具型光谱滤波器。通过适当调谐腔的谐振频率，可以提取具有较窄持续时间和时间上移位的强度峰值的波包。
To study the dynamical optical interactions of nano-scaled metal-insulator-metal (MIM) structures in temporal-frequency domain, femtosecond surface plasmon polariton (SPP) wave packets propagate over a surface with a MIM structure. The resonance nature of the SPP-cavity interaction is reflected as strong modulations in the spectra of transmitted and reflected SPP wavepackets, which show peaks and valleys, respectively, corresponding to the MIM cavity's eigenmode. These features indicate that the MIM structure acts as a Fabry-Pérot etalon-type spectrum filter. With appropriate tuning of the resonance frequency of the cavity, one can extract a wave packet with a narrower time duration and temporally shifted intensity peak.