研究目的
Investigating the design and characteristics of an As2Se3-Ge11.5As24Se64.5 based dual nano-slot waveguide with huge and wavelength tunable dispersion for mid-infrared applications.
研究成果
A novel As2Se3-Ge11.5As24Se64.5 based dual-slot waveguide with giant and wavelength tunable chromatic dispersion in mid-IR is proposed. The intensive resonance coupling interaction between two fundamental slot-waveguide modes enable tuning of the dispersion flexibly. The proposed dual-slot waveguide has potential application in various on-chip photonic systems, which will open a new avenue of mid-IR photonics.
研究不足
The dual-slot waveguide is particularly sensitive to fabrication error due to its small size and high refractive index contrast.
1：Experimental Design and Method Selection:
The modal characteristics of the proposed dual-slot optical waveguide are investigated by using the FDTD method of Mode Solver (? Lumerical).
2：Sample Selection and Data Sources:
The refractive indices of silicon, silica, As2Se3 and Ge
3：5As24Se5 are considered via the Sellmeier equations in this simulation. List of Experimental Equipment and Materials:
As2Se3 and Ge
4：5As24Se5 are used as the waveguide slot core material. Experimental Procedures and Operational Workflow:
The influence of waveguide geometric parameters on the peak dispersion magnitude, central wavelength, and FWHM is investigated.
5：Data Analysis Methods:
The chromatic dispersion of TE mode is obtained through the effective refractive index.
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