The effect of the voltage waveform on the microstructure and optical properties of porous anodic alumina photonic crystals
| Autor: | Chunxin Sun, Qin Xu, Shunzhen Feng, Qi Peng, Shi-Yuan Zhang, Tian Lan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Nanostructure Scanning electron microscope chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 01 natural sciences Corrosion Inorganic Chemistry Aluminium Electrical and Electronic Engineering Physical and Theoretical Chemistry Spectroscopy Photonic crystal business.industry Anodizing Organic Chemistry 021001 nanoscience & nanotechnology Microstructure Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Optoelectronics 0210 nano-technology business |
| Zdroj: | Optical Materials. 98:109488 |
| ISSN: | 0925-3467 |
| Popis: | Porous anodic alumina photonic crystals (PAA-PhCs) with brilliant colours were successfully fabricated by pulse anodization of aluminium in an oxalic acid electrolyte. The influence of the voltage waveform on the microstructure of the PAA-PhCs was investigated by adjusting the anodization period, anodization amplitude, and anodization offset. Here, we report a simplified method for compensation of the photonic band gap (PBG) drift using AC waveforms instead of the periodic length-controlled method. Scanning electron microscopy (SEM) results showed that the layer thickness of the PAA-PhC prepared by an AC pulse was gradually reduced from 360 nm to 290 nm, which was completely different from a previous report showing that the layer thickness of a sample prepared by a DC pulse remained unchanged. In addition, the effect of chemical corrosion in a phosphoric acid solution on the microstructures of the PAA-PhCs was analysed by comparative experiments. PBG drift caused by minor defects in the nanostructure during the anodization process could also be compensated for by adjusting the anodizing time and corrosion time. Our approach may help to broaden the potential applications of and provide important guidance for photonic crystal display and new devices. |
| Databáze: | OpenAIRE |
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