研究目的
Investigating the thermal design management of a highly mechanically stable wavelength shifter using a photonic crystal waveguide for applications in optical devices.
研究成果
The study successfully demonstrates a thermally tunable PCW-based device with high mechanical stability and performance. The use of circular turns in the MHP and optimization of the MHP to insulation layer area reduces stress and improves device reliability. The device shows potential for wide-range tuning in switches and filters applications.
研究不足
The study is limited by the stress generated in the device layers due to thermal expansion, which can affect the device's mechanical stability and performance. The response time of 12 μs may also be a limiting factor for certain high-speed applications.
1：Experimental Design and Method Selection:
The study involves the integration of a micro-hotplate (MHP) with a photonic crystal waveguide (PCW) for thermal tuning. The design focuses on modeling temperature and stress in the MHP to ensure device robustness and stability.
2：Sample Selection and Data Sources:
The PCW structure consists of an array of air holes in a silicon slab with elliptical air holes etched in a triangular/hexagonal lattice. A line defect is created in the center for high confinement of electromagnetic fields.
3：List of Experimental Equipment and Materials:
The device is fabricated on a Silicon on Insulator (SOI) platform with a nickel-based MHP and an insulation layer of silicon oxide.
4：Experimental Procedures and Operational Workflow:
The device's performance is evaluated by applying actuation potential to the MHP, leading to thermal generation and a shift in the transmission spectrum of the PCW.
5：Data Analysis Methods:
The study uses the Finite Element Method for analyzing the transmission spectrum and evaluates performance parameters like confinement factor, wavelength transfer coefficient, and extinction ratio.
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