研究目的
To design and simulate a high sensitivity H2S gas sensor using a combination of graphene properties as a hydrogen sulfide-sensitive nanomaterial and features of photonic crystal cavity.
研究成果
The designed sensor achieved a high sensitivity of 1.2 ×104 nm/RIU and a detection limit of 1.87×10-6 RIU, outperforming previously reported sensors. The use of graphene as a sensitive material significantly enhanced the sensor's performance.
研究不足
The study is based on simulation and theoretical analysis; practical implementation and testing under real-world conditions are not covered.
1：Experimental Design and Method Selection:
The sensor was designed using a photonic crystal cavity with a graphene layer deposited on the inner wall of two air holes to adsorb H2S gas. The changes in the refractive index of graphene due to gas concentration were measured.
2：Sample Selection and Data Sources:
The study used a triangular array of air holes on a silicon-on-insulator substrate.
3：List of Experimental Equipment and Materials:
The MODE Solution software was used for simulation, with a graphene layer thickness of
4：34 nm. Experimental Procedures and Operational Workflow:
The sensor's transmittance spectrum was analyzed at various H2S concentrations to observe wavelength shifts.
5：Data Analysis Methods:
The sensitivity and detection limit were calculated based on the wavelength shifts observed in the transmittance spectrum.
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