Abstract

This theoretical modeling and simulation paper presents designs and projected performances of two non-volatile, broadband, on-chip 2×2 electro-optical switches based upon the germanium-on-insulator (GeOI) photonic-electronic platform operating at the 2.5 µm mid-infrared wavelength. The switches are the two-waveguide directional coupler (DC) and the Mach-Zehnder interferometer (MZI). A thin-film graphene Joule-effect micro-heater is assumed on the planarized GeOI device to change the phase reversibly of DC-slot-embedded Sb₂Se₃ phase-change material from crystalline to amorphous. Stable multi-level switching is attained via partial amorphization and thermal modeling of voltage pulses on graphene.

Abstract

This theoretical modeling and simulation paper presents designs and projected performances of two non-volatile, broadband, on-chip 2×2 electro-optical switches based upon the germanium-on-insulator (GeOI) photonic-electronic platform operating at the 2.5 µm mid-infrared wavelength. The switches are the two-waveguide directional coupler (DC) and the Mach-Zehnder interferometer (MZI). A thin-film graphene Joule-effect micro-heater is assumed on the planarized GeOI device to change the phase reversibly of DC-slot-embedded Sb₂Se₃ phase-change material from crystalline to amorphous. Stable multi-level switching is attained via partial amorphization and thermal modeling of voltage pulses on graphene.

Abstract

This theoretical modeling and simulation paper presents designs and projected performances of two non-volatile, broadband, on-chip 2×2 electro-optical switches based upon the germanium-on-insulator (GeOI) photonic-electronic platform operating at the 2.5 µm mid-infrared wavelength. The switches are the two-waveguide directional coupler (DC) and the Mach-Zehnder interferometer (MZI). A thin-film graphene Joule-effect micro-heater is assumed on the planarized GeOI device to change the phase reversibly of DC-slot-embedded Sb₂Se₃ phase-change material from crystalline to amorphous. Stable multi-level switching is attained via partial amorphization and thermal modeling of voltage pulses on graphene.

Abstract

This theoretical modeling and simulation paper presents designs and projected performances of two non-volatile, broadband, on-chip 2×2 electro-optical switches based upon the germanium-on-insulator (GeOI) photonic-electronic platform operating at the 2.5 µm mid-infrared wavelength. The switches are the two-waveguide directional coupler (DC) and the Mach-Zehnder interferometer (MZI). A thin-film graphene Joule-effect micro-heater is assumed on the planarized GeOI device to change the phase reversibly of DC-slot-embedded Sb₂Se₃ phase-change material from crystalline to amorphous. Stable multi-level switching is attained via partial amorphization and thermal modeling of voltage pulses on graphene.