研究目的
To experimentally analyze in detail how to integrate graphene onto a silicon waveguide and the corresponding performance improvements in self-phase modulation (SPM) on silicon photonic waveguides.
研究成果
The integration of graphene in silicon waveguides enhances the nonlinear parameter from 150 W?1m?1 to 510 W?1m?1, and enhances Kerr nonlinearity to 2.7 × 10?13 cm2/W as well as figure-of-merit up to ≈ 2.5 in this hybrid system.
研究不足
The study does not account for spontaneous raman scattering (SRS) and the free carrier effect (FCA) during the on chip SPM formation in silicon waveguides.
1：Experimental Design and Method Selection:
The study involves fabricating silicon-on-insulator waveguides covered with graphene and investigating self-phase modulation.
2：Sample Selection and Data Sources:
Devices were fabricated on a silicon-on-insulator wafer with specific dimensions.
3：List of Experimental Equipment and Materials:
Includes a PriTel FFL-TW laser, Corning SMF 28 tapered lensed fiber, and an optical spectrum analyzer (YOKAGAWA AQ6370D).
4：Experimental Procedures and Operational Workflow:
Launching
5：0-picosecond pulse into the waveguide and observing the spectral broadening of the pulses as a function of the input power. Data Analysis Methods:
Using the nonlinear Schr?dinger equation with the split-step Fourier method to simulate the on-chip SPM generation.
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