研究目的
Investigating the reflection spectra of composite one-dimensional photonic crystals based on porous anodic alumina filled with ferroelectric sodium nitrite and their potential applications as selective narrowband mirrors.
研究成果
The study demonstrated significant spectral shifts and a decrease in the half-widths of stopbands in composite photonic crystals filled with sodium nitrite, suggesting their potential use as selective narrowband mirrors and filters.
研究不足
The study is limited to the wavelength range of 400 to 1200 nm and normal incidence of light. The effects of varying angles of incidence and other wavelengths are not explored.
1：Experimental Design and Method Selection:
The study involved recording reflection spectra of composite photonic crystals under normal incidence of light.
2：Sample Selection and Data Sources:
Samples were thin multilayer alumina films obtained by electrochemical etching of aluminum, filled with sodium nitrite.
3：List of Experimental Equipment and Materials:
Halogen lamp as a radiation source, spectrophotometer for recording reflection spectra.
4：Experimental Procedures and Operational Workflow:
Reflection spectra were recorded before and after impregnation with sodium nitrite solution.
5：Data Analysis Methods:
Analysis of spectral shifts and half-widths of stopbands using Bragg condition and effective refractive index calculations.
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