Design of Plasmonic Comb-Like Filters Using Loop-Based Resonators

Abstract

Metal-insulatormetal waveguide-based band-pass filter with circular ring resonator containing Kerr nonlinear medium, Opt Commun (2013). 7. Y. Guo, L. Yan, W. Pan, B. Luo, K. Wen, Z. Guo, and X. Luo, Characteristics of plasmonic filters with a notch located along rectangular resonators, Plasmonics (2012), 1-5. 8. M.P. David, Microwave engineering, Wiley, Hoboken, NJ, 2005. 9. P.B. Johnson and R. Christy, Optical constants of the noble metals, Phys Rev B 6 (1972), 4370.ABSTRACT: In this article, a new ultrawideband (UWB) bandpass filter is proposed, with dual stepped-impedance stub-loaded resonators (SISLRs). As the proposed filter can provide the better in-band performance due to the dual SISLRs, it was possible to design this UWB filter without apertures in the ground plane. The passband performance of the proposed filter is superior to that of the conventional filter based on a single SISLR with aperture-backed interdigital coupled-lines, while the resonant frequencies and sharp rejection skirt characteristics of the conventional filter are retained without apertures in the ground plane. The performance of the new filter was confirmed by simulation with a fullwave electromagnetic simulator and by actual implementation and measurement. The passband of the implemented filter covers the range of 3.24$11.03 GHz. The group delay is less than 0.5 ns and flat in the passband, and sharp attenuations appear near the passband.

Analysis of Filter and Waveguide Effect Based on the MIM Nanodisk with a Metallic Block

“…Subsequently, unidirectional excitation of SPPs in Tshaped waveguide with nanodisk resonator has been analyzed theoretically and numerically [25]. More recently, comblike filters have been demonstrated [26]. These previous structures merely perform as filters.…”

Dynamically Tunable by Kerr Effect Multichannel Filter Based on Plasmon Induced Transparencies at Optical Communication Range

“…Among various SPPs structures, the metal-dielectric-metal (MDM) configuration has attracted great interest because the devices have a small footprint and are a benefit for chip-integrated. Many nanoscale SPP-based photonic devices such as band-pass [3][4][5][6][7][8][9][10] and band-stop [11][12][13][14][15] filters, (de)multiplexers [16], MachZehnder interferometers [17], switchings [18], sensors [19], and logic grates [20] have been investigated both numerically and experimentally. As one of the most prevalent devices in optical circuits, plasmonic filters based on plasmon-induced transparencies (PITs) which are strong destructive interferences coupling between wideband bright modes and narrowband dark modes have been studied widely [8,21].…”

Theoretical analysis of plasmonic unidirectional propagation at visible frequency based on subwavelength waveguide

“…Usually, subwavelength slits or gratings in a metal film are employed to reduce the momentum mismatch between the SPP modes and the p-polarized light, so that SPPs will propagate along both directions on the metal/insulator interfaces for all those symmetrical structures, such as rectangle grooves, slot cavities, and so on [8][9][10][11][12][13]. This character may limit the development of the plasmonic devices which need the directional propagation of SPPs.…”