The work presents a surface plasmon resonance sensor able to operate the non-radiative and radiative surface plasmons simultaneously. The optical coupling between photons and surface plasmons was mediated by a rough surface, allowing the photon emission by radiative plasmons excitation process. Experimental tests with reversible and irreversible binding were performed, and the results were compared. The SPR curve profile indicates normalized values < 1 for SP absorption and values > 1 for SP emission. This feature suggests the involvement of localized SP-states that co-exist in the film with delocalized propagating SP state. The data extraction process and the performance of these two excitation forms are also reported. The higher performance of the non-radiative surface plasmons absorption is by a factor of 4.

中文翻译：

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辐射和非辐射表面等离子体共振：实时传感性能的比较

该工作提出了一种表面等离子体激元共振传感器，该传感器能够同时操作非辐射和辐射表面等离子体激元。光子与表面等离激元之间的光耦合由粗糙表面介导，从而允许通过辐射等离激元激发过程来进行光子发射。进行了具有可逆和不可逆结合的实验测试，并对结果进行了比较。SPR曲线轮廓表示标准化吸收值<1对SP的吸收和标准化值> 1对于SP的发射。该特征表明，在电影中与局域传播的SP状态共存的局域SP状态的参与。还报告了这两种激发形式的数据提取过程和性能。非辐射表面等离子体激元吸收的性能提高了4倍。