Üç boyutlu plazmonik çubuk tınlayıcıların teorik ve deneysel analizi

We compare the performance of plasmonic waveguide integrated stub-resonators based on 2D metal-dielectric-metal (MDM) and 3D slot-waveguide (SWG) geometries. We show that the scattering matrix theory can be extended to 3D devices, and by employing the scattering matrix theory we provide the guidelines for designing plasmonic 2D and 3D single-stub and double-stub resonators with a desired spectral response at the design wavelength. We provide transmission maps of 2D and 3D double-stub resonators versus stub lengths, and we specify the different regions on these maps that results in a dip, a peak or a plasmonically induced transparency (PIT) shape in the transmission spectrum. Radiation loss from waveguide terminations leads to a performance degradation in the 3D slot-waveguide based resonators. We illustrate improved waveguide terminations that boost resonator properties. We verify our results with 3D FDTD simulations. The designed devices are fabricated with electron-beam lithography. In the fabrication phase we add Yagi-Uda style dipole antennas to the input and output ports of the slot-waveguides to increase the coupling efficiency of the far-field input beam into the subwavelength gap of the slot-waveguides. Furthermore, 90 degree bent waveguides are used to increase the signal-to-noise ratio via a cross-polarization based measurement scheme. A home-built reflection microscope setup is used for the characterization of plasmonic double-stub resonators.