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Ma J X, Zeng D Z, Yang Y T, Pan C, Zhang L et al. A review of crosstalk research for plasmonic waveguides. Opto-Electron Adv 2, 180022 (2019). doi: 10.29026/oea.2019.180022
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Abstract
Plasmonic waveguides, as a competitive candidate, have been widely studied in rapid developing photonic integrated circuits (PICs) and optical interconnection fields. However, crosstalk between plasmonic waveguides is a critical issue that has to be considered in practice. Actually, crosstalk dominates the ultimate integration density of the planar photonic circuits. This paper reviews the recent research work on evaluation methods and crosstalk suppression approaches of plasmonic waveguides. Three crosstalk evaluation methods based on comparison of specific parameters of waveguides have been summarized. Furthermore, four specific approaches to reduce crosstalk have been illustrated as two categories according to their impacts on waveguide performances and the whole circuit. One means of crosstalk suppression is changing the placement of waveguides, which could maintain the transmission characteristics of the original waveguide. The other means is inserting medium, which has the advantage of occupying smaller space compared to the first method. Consequently, to suppress crosstalk between plasmonic waveguides, one should choose suitable approach.-
Keywords:
- crosstalk /
- surface plasmons /
- guided waves /
- photonic integrated circuits /
- optical interconnection
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References
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Ma J X, Zeng D Z, Yang Y T, Pan C, Zhang L et al. A review of crosstalk research for plasmonic waveguides. Opto-Electron Adv 2, 180022 (2019). doi: 10.29026/oea.2019.180022
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Figure 1.
Four different waveguide schematics ((a), (b), (c), (d)) and the dependences of (e) coupling length Lc and (f) maximum transfer power Pmax on separation distance D 23.
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Figure 2.
(a) The schematic of two adjacent parallel channel plasmonpolariton waveguides. (b) The crosstalk performance with specific parameters 27.
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Figure 3.
(a) The 2D and (b) 3D schematic diagrams of two WPP waveguides. Normalized crosstalk power of WPP waveguides under different parameters with wedge height (c) h=0.5 μm and (d) h=1.6 μm 32.
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Figure 4.
Schematic diagrams of (a) hybrid waveguide and (b) its rotation, (c) distribution of Ey field for rotation hybrid waveguide, (d) coupling length Lc and (e) maximum power transfer Pmax as functions of the separation D, the red solid line and blue dotted line represent the results of the two structures of (a) and (b), respectively 25.
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Figure 5.
Schematic configuration of the two parallel hybrid silicon plasmonic waveguides (HSPW) (a) without and (b) with metallic strip. The maximum power transfer Pmax versus specific parameters (separation distance D, height h and width w of the metallic strip) (c) without and (d) with metallic strip 30.
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Figure 6.
(a) The schematics of the surface plasmon waveguide system with the auxiliary waveguide. The distribution of the absolute values of the electric fields at waveguides (b) with and (c) without the auxiliary waveguide 33.
