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 overlying metal heaters. A maximum coupling rate of 1.25 GHz is achieved, demonstrating the potential for mid-infrared photonic integrated circuits.
研究不足
The study is limited by fabrication variations that cause initial resonance wavelength differences between the two microring resonators. The thermo-optic tuning mechanism may also introduce thermal crosstalk and power consumption issues.
1：Experimental Design and Method Selection:
The study involves the design and fabrication of coupled microring resonators on a GeOI platform, utilizing thermo-optic tuning for resonance alignment.
2：Sample Selection and Data Sources:
A device layer of around 250 nm of Ge is used, with waveguides designed to be 500 nm wide for single-mode operation.
3：List of Experimental Equipment and Materials:
Includes a GeOI photonic platform, nickel metal lines for localized tuning, and heater lines for tunability.
4：Experimental Procedures and Operational Workflow:
Involves the fabrication of microring resonators with specific radii and coupling gaps, deposition of a SiO2 cladding layer, and implementation of heater lines.
5：Data Analysis Methods:
The resonance detuning of the coupled microring resonators system is analyzed using a theoretical model to determine the coupling rate.
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