研究目的
To theoretically investigate the enhancement of Goos-H?nchen shift of graphene coated on a truncated one-dimensional photonic crystal and its sensing capability.
研究成果
The proposed graphene-coated 1D PC structure enables a significantly enhanced Goos-H?nchen shift due to the excitation of Bloch surface wave mode, showing potential for superior sensing performance in optoelectronic applications.
研究不足
The study is theoretical and does not include experimental validation. The practical implementation of the proposed structure and its performance under real-world conditions are not discussed.
1：Experimental Design and Method Selection:
The study employs a theoretical approach to investigate the Goos-H?nchen shift enhancement using a graphene-coated one-dimensional photonic crystal structure. The transfer matrix method and finite-element method (FEM) based on COMSOLTM are used for calculations.
2：Sample Selection and Data Sources:
The structure consists of graphene layers placed on a truncated 1D PC multilayer dielectric stack with alternating high-index and low-index layers. The refractive indices of materials at the operating wavelength of 785 nm are considered.
3：List of Experimental Equipment and Materials:
The design includes a ZF10 glass substrate, TiO2 and SiO2 layers, and graphene layers. The thickness of graphene monolayer is 0.34 nm.
4：34 nm.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The photonic band gap distribution is calculated to demonstrate the excitation of the Bloch surface wave mode. The angular reflectance and phase variation are simulated to determine the resonance angle and the effective refractive index.
5：Data Analysis Methods:
The Goos-H?nchen shift is calculated based on the phase variation around the resonance location using diffraction theory.
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