In this work, we design and numerically analyze a D-shaped photonic crystal fiber (PCF) plasmonic sensor based on metallic grating. The influence of the geometrical and optical parameters of the metallic grating on the performance of the proposed plasmonic refractive index sensor are thoroughly investigated considering several metals and grating configurations. The metallic grating is placed over the polished surface and gold and silver are used for this purpose. The sensitivity of the sensor and the resonant wavelength can be tuned by judiciously adjusting the grating parameters: shape, thickness, width and period. The proposed sensor exhibits excellent sensing characteristics and can be applied for several real time and fast response applications such as biological, biochemical and environmental sensing..
A multipeak Metasurfaces are the two dimensional equivalents of bulk metamaterials [1, 2], which represent a
sudden variation of optical properties when an incident wave interacts with it, yielding the most exotic optical
phenomena, such as broadband absorption, wavefront shaping or the anomalous refraction and reflection. This paper
proposes, through simulations, a model of a purely dielectric metasurface without losses, allowing the incident
wave’s global phase control, from - π to π, for operation on optical frequencies (1.55 μm) by inserting structures that
have contrasting refractive indexes. To demonstrate the phase control, a linear phase profile has been utilized to
cause the anomalous refraction phenomena, which has applications in wireless optical communications.
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