研究目的
To demonstrate the operation of a thermally tunable coupled-resonator-induced transparency system on a germanium-on-insulator photonic platform at a mid-infrared wavelength.
研究成果
The study successfully realizes coupled-resonator-induced transparency using two evanescently coupled microring resonators on a GeOI photonic platform, with tunability achieved through a simple overlying metal heater. A maximum coupling rate of 1.25 GHz is calculated at a specific heating power.
研究不足
The study is limited by fabrication variations leading to initial differences in resonance wavelengths of the microring resonators. The tuning mechanism relies on thermal effects, which may introduce limitations in speed and efficiency.
1：Experimental Design and Method Selection:
The study involves the design and fabrication of two evanescently coupled microring resonators on a GeOI platform.
2：Sample Selection and Data Sources:
A device layer of around 250 nm of Ge is used, obtained by the Smart-cutTM process.
3：List of Experimental Equipment and Materials:
Ge waveguides, microring resonators (R1 and R2), silicon dioxide (SiO2) cladding layer, nickel metal line for localized tuning.
4：Experimental Procedures and Operational Workflow:
The resonators are designed for single-mode operation, with specific radii and coupling gaps. A heater line is implemented on R1 for tunability.
5：Data Analysis Methods:
The resonance detuning of the coupled microring resonators system is analyzed using a specific equation to determine the coupling rate.
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