研究目的
Investigating the design and fabrication of polarized and unpolarized wideband semiconductor mirrors operating in the mid-IR band.
研究成果
Inexpensive and durable Germanium-Zinc sulfide semiconductor reflectors are proposed which can demonstrate a range of wideband and polarisation sensitive or insensitive responses. The semiconductor nature of both Ge and ZnS also offer a possibility of opto-electronic applications.
研究不足
The influence of substrate absorption on reflection efficiency is a potential limitation that needs to be tested.
1：Experimental Design and Method Selection:
The design parameters are determined using a particle swarm optimization algorithm and then manually optimized.
2：Sample Selection and Data Sources:
Germanium is used for its IR transparency and high index of refraction as the waveguide layer, and zinc sulfide is chosen for the substrate for its durability and commercial availability.
3：List of Experimental Equipment and Materials:
Germanium and zinc sulfide are the primary materials.
4：Experimental Procedures and Operational Workflow:
Fabrication of four representative resonant devices: a single layer grating, a single layer two-dimensional symmetric square post structure, and a repeat of the two designs that incorporates an additional homogenous waveguide layer.
5：Data Analysis Methods:
Spectral responses are tested through fabrication and simulation.
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