Influence of Anodization Temperature on Geometrical and Optical Properties of Porous Anodic Alumina(PAA)-Based Photonic Structures
| Autor: | Małgorzata Norek, Ewelina Białek, Maksymilian Włodarski |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
PAA-based DBR
Materials science lcsh:Technology Article Spectral line General Materials Science Porosity porous anodic alumina (PAA) lcsh:Microscopy lcsh:QC120-168.85 photonic stop band (PSB) lcsh:QH201-278.5 Anodizing business.industry High-refractive-index polymer lcsh:T temperature Pulse sequence Distributed Bragg reflector Anode transmission spectra distributed Bragg reflector (DBR) pulse anodization lcsh:TA1-2040 Optoelectronics lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering Photonics business lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 |
| Zdroj: | Materials, Vol 13, Iss 3185, p 3185 (2020) Materials Volume 13 Issue 14 |
| ISSN: | 1996-1944 |
| Popis: | In this work, the influence of a wide range anodizing temperature (5&ndash 30 ° C) on the growth and optical properties of PAA-based distributed Bragg reflector (DBR) was studied. It was demonstrated that above 10 ° C both structural and photonic properties of the DBRs strongly deteriorates: the photonic stop bands (PSBs) decay, broaden, and split, which is accompanied by the red shift of the PSBs. However, at 30 ° C, new bands in transmission spectra appear including one strong and symmetric peak in the mid-infrared (MIR) spectral region. The PSB in the MIR region is further improved by a small modification of the pulse sequence which smoothen and sharpen the interfaces between consecutive low and high refractive index layers. This is a first report on PAA-based DBR with a good quality PSB in MIR. Moreover, it was shown that in designing good quality DBRs a steady current recovery after subsequent application of high potential (UH) pulses is more important than large contrast between low and high potential pulses (UH-UL contrast). Smaller UH-UL contrast helps to better control the current evolution during pulse anodization. Furthermore, the lower PSB intensity owing to the smaller UH-UL contrast can be partially compensated by the higher anodizing temperature. |
| Databáze: | OpenAIRE |
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