Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Figure 6

(a) Schematic diagram of the proposed plasmonic nanoresonators. Inset is the scanning electron microscopy (SEM) image of the fabricated device. Scale bar, 1 μm. (b) Plasmon dispersions in MIM stack array. The shaded region indicates the visible range. (c) Simulated transmission spectra for the RGB filters. The solid and dash curves correspond to TM and TE illuminations, respectively. (d) Cross section of the time-average magnetic field intensity and electric displacement distribution (red arrow) inside the MIM stack at a wavelength of 650 nm with 360 nm stack period. (e) SEM image of the fabricated 1D plasmonic spectroscope with gradually changing periods from 400 to 200 nm (from left to right). Scale bar, 2 μm. (f) Optical microscopy image of the plasmonic spectroscope illuminated with white light. Figures are reproduced from [17].

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