研究目的
Investigating the therapeutic effects of a specific herbal medicine on a particular disease.
研究成果
The study concludes that a planar HEPD composed of the Au/MoS2/Au Fabry-Pérot cavity can broaden the bandwidth of responsivity of MoS2 in the near-infrared region. The Fabry-Pérot resonance in the Au/MoS2/Au cavity can enhance the absorption of both MoS2 and Au, which can lead to a photoresponsivity enhancement via hot electron emission. The architecture is electron beam lithography-free and cost-effective, and thus it is a perfect candidate for large-area production and utilization in hot electron harvesting applications ranging from photothermal heating, photovoltaics, photochemical catalysis, and photodetection.
研究不足
The technical and application constraints of the experiments include the costly and time-consuming lithography and electron beam lithography processes. Potential areas for optimization include the reduction of fabrication difficulties and the enhancement of photoresponsivity.
1：Experimental Design and Method Selection:
The study involves the design of a planar hot-electron photodetector utilizing high refractive index MoS2 in a Fabry-Pérot perfect absorber. The theoretical models and algorithms employed include the finite-difference time-domain method for simulation.
2：Sample Selection and Data Sources:
The samples used in the experiment are Au/MoS2/Au cavities on a silica substrate. The optical constants of Au, silicon, and MoS2 are extracted from Johnson and Christy, Palik, and ref.43, respectively.
3：List of Experimental Equipment and Materials:
The materials include Au, MoS2, and silica substrate. The equipment includes a commercially available software based on the finite-difference time-domain method (Lumerical).
4：Experimental Procedures and Operational Workflow:
The simulation is carried out using a two-dimensional (2D) simulation region to reduce simulation time due to the planar symmetry structure of the HEPD. The propagation of the plane wave source is set along the x direction; the periodic boundary condition is used along the z direction and a perfectly matched layer (PML) is used along the x direction.
5：Data Analysis Methods:
The frequency domain power monitor is used to obtain the normalized electric field distributions of the HEPD at the resonance wavelength. The absorption of each component of the HEPD is obtained from analysing power absorption in objects.
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