Calculating Transmittance and Field Enhancement of n-Layer MIM Surface Plasmon Structure for Detection of Biological Nano-Objects
In this paper, transmittance property of n-layer metal-insulator-metal surface plasmon structure is analytically investigated in the visible range of electromagnetic spectrum. Here n-layer signifies the critical number of layers after which increase in layer number insignificantly modifies the photonic behavior of the structure. Corresponding field enhancement is also computed to study the critical dimensions and external incident angles for maximum energy reflection. Peak in transmittance spectra is calculated when propagation constant of plasmon surface and that of incident wave becomes nearly equal. Results will help to detect biological nano-objects whose signature viruses have the same wavelength when transmittance peak occurs.
KeywordsTransmittance Field enhancement MIM structure Surface plasmon Resonance Angle of incidence
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