Ultra-wideband high-speed Mach-Zehnder switch based on hybrid plasmonic waveguides.

作者: Babak Janjan , Davood Fathi , Mehdi Miri , Mohsen Ghaffari-Miab

DOI: 10.1364/AO.56.001717

关键词: Switching timePower dividers and directional couplersPicosecondOpticsBroadbandUltra-widebandPhysicsBandwidth (signal processing)Figure of meritMach–Zehnder interferometer

摘要: In this paper, the distinctive dispersion characteristic of hybrid plasmonic waveguides is exploited for designing ultra-wideband directional couplers. It shown that by using optimized geometrical dimensions waveguides, nearly wavelength-independent couplers can be achieved. These broadband are then used to design Mach-Zehnder-interferometer-based switches. Our simulation results show ultra-wide bandwidth ∼260  nm proposed plasmonic-waveguide-based switch. Further investigation Mach-Zehnder switch confirms because strong light confinement in waveguide structure, switching time, power consumption, and overall footprint device significantly improved compared silicon-ridge-waveguide-based For designed coupler, time found less than one picosecond, while VπLπ figure merit, active length ∼61  fJ/bit, 85  V×μm, 30 μm, respectively.

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