Field-level characterization of the optical response in J-aggregate/metal hybrid nanostructures by chirp-compensated spectral interferometry

Field-level characterization of the optical response in J-aggregate/metal hybrid nanostructures by chirp-compensated spectral interferometry
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通过线性调频补偿光谱干涉法对 J 聚集体/金属混合纳米结构中的光学响应进行场级表征

DOI:
10.1063/1.4980043
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发表时间:
2017-04
影响因子:
4
通讯作者:
Lienau Christoph
Lienau Christoph
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang Wei;Zhang Hong;Vogelgesang Ralf;Vasa Parinda;Lienau Christoph

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我们利用啁啾补偿光谱干涉法在场水平上全面探测J-聚集体/金属杂化纳米结构中强耦合激子(Xs)和表面等离子体激子(SPPs)的光学响应。从理论和实验上分析了干涉臂中的高阶啁啾对光谱相位恢复的影响。通过将测量的光谱和相位同时拟合到Fano线型模型,可以精确地定量描述X-SPP极化响应。通过傅里叶变换,我们进一步推导出再发射极化子场的时间结构,在100ps的超短时间尺度内表现出明显的衰减极化振荡。
We use chirp-compensated spectral interferometry to fully probe the optical response of strongly coupled excitons (Xs) and surface plasmon polaritons (SPPs) in J-aggregate/metal hybrid nanostructures at a field level. The effect of higher order chirp in the interferometric arms on the spectral phase retrieval is theoretically and experimentally analyzed. A quantitative description of the X-SPP polariton response is precisely obtained by simultaneously fitting the measured spectra and phases to a Fano lineshape model. We further deduced the time structure of the reemitted polariton field by Fourier transform to the time domain, which shows clear damped polarization oscillations within an ultrashort time scale of 100 fs.
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