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Article

Influence of Anodization Temperature on Geometrical and Optical Properties of Porous Anodic Alumina(PAA)-Based Photonic Structures

1
Institute of Materials Science and Engineering, Faculty of Advanced Technologies and Chemistry, Military University of Technology, Str. gen Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland
2
Institute of Optoelectronics, Military University of Technology, Str. gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(14), 3185; https://doi.org/10.3390/ma13143185
Received: 23 June 2020 / Revised: 11 July 2020 / Accepted: 13 July 2020 / Published: 16 July 2020
In this work, the influence of a wide range anodizing temperature (5–30 °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. View Full-Text
Keywords: porous anodic alumina (PAA); pulse anodization; distributed Bragg reflector (DBR); PAA-based DBR; transmission spectra; photonic stop band (PSB); temperature porous anodic alumina (PAA); pulse anodization; distributed Bragg reflector (DBR); PAA-based DBR; transmission spectra; photonic stop band (PSB); temperature
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MDPI and ACS Style

Białek, E.; Włodarski, M.; Norek, M. Influence of Anodization Temperature on Geometrical and Optical Properties of Porous Anodic Alumina(PAA)-Based Photonic Structures. Materials 2020, 13, 3185. https://doi.org/10.3390/ma13143185

AMA Style

Białek E, Włodarski M, Norek M. Influence of Anodization Temperature on Geometrical and Optical Properties of Porous Anodic Alumina(PAA)-Based Photonic Structures. Materials. 2020; 13(14):3185. https://doi.org/10.3390/ma13143185

Chicago/Turabian Style

Białek, Ewelina; Włodarski, Maksymilian; Norek, Małgorzata. 2020. "Influence of Anodization Temperature on Geometrical and Optical Properties of Porous Anodic Alumina(PAA)-Based Photonic Structures" Materials 13, no. 14: 3185. https://doi.org/10.3390/ma13143185

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