A semi-analytical decomposition analysis of surface plasmon generation and the optimal nanoledge plasmonic device
作者： Zheng Zeng , Madu N. Mendis , David H. Waldeck , Jianjun Wei
DOI: 10.1039/C6RA01105E
关键词: Surface plasmon polariton 、 Plasmon 、 Finite-difference time-domain method 、 Optics 、 Aperture 、 Light scattering 、 Surface plasmon 、 Materials science 、 Surface plasmon resonance 、 Localized surface plasmon
摘要: Surface plasmon resonance (SPR) of nanostructured thin metal films (so-called nanoplasmonics) has attracted intense attention due to its versatility for optical sensing and chip-based device integration. Understanding the underlying physics developing applications nanoplasmonic devices with desirable properties, e.g. intensity light scattering high refractive index (RI) sensitivity at perforated film, is crucial practical uses in physics, biomedical detection, environmental monitoring. This work presents a semi-analytical model that enables decomposition quantitative analysis surface generation new complex nanoledge aperture structure under plane-wave illumination, thus providing insight on how optimize plasmonic optimal efficiencies RI sensitivity. A factor parameters (geometric, dielectric-RI, incident wavelength) relevant quantitatively investigated predict polariton (SPP) efficiency. In concert analytical treatment, finite-difference time-domain (FDTD) simulation used transmission spectra as function device's geometric parameters, it shows good agreement model. Further validation approach provided by fabricating subwavelength testing their
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