Journal
ACS APPLIED POLYMER MATERIALS
Volume 4, Issue 10, Pages 7387-7396Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.2c01149
Keywords
photonic crystals; porous silicon; photonic band gap; cavity mode; azobenzene; LC polymers; photo-orientation
Funding
- Russian Foundation for Basic Research
- Czech Science Foundation [19-53-26007, CSF 20-22615J]
- Russian Science Foundation [22-13-00055]
- Ministry of Education, Youth and Sports of the Czech Republic [LTC19051]
- Operational Programme Research, Development and Education - European Structural and Investment Funds [SOLID21-CZ.02.1.01/0.0/0.0/16 _019/0000760]
- Sirius University
Ask authors/readers for more resources
Photo-tunable photonic structures filled with photochromic azobenzene-containing compounds were prepared and their properties were studied. Irradiation with polarized blue light resulted in spectral changes associated with photo-orientation of azobenzene moieties. The observed photoinduced split was reversible and could be fully recovered by heating. The prepared composites have great potential in photonics applications.
Phototunable photonic structures based on electrochemically etched silicon filled with four photochromic azobenzene-containing compounds, a bent-shaped low-molar mass substance and side-chain polymethacrylates and a copolyacrylate, were prepared, and their photo-optical properties were studied. It was found that irradiation of these composites with polarized blue light results in spectral changes in the photonic band gap (split of the cavity mode) associated with cooperative photo-orientation of azobenzene moieties inside silicon pores in the direction perpendicular to the polarization plane of the incident light. Kinetics of the photoinduced split is studied. The observed photoinduced split is completely reversible, and heating of the composites to temperatures above isotropization or glass transitions fully recovers the initial spectral shape of the photonic band gap. Thermal and temporal stabilities of the obtained photoinduced split were comparatively studied, and it was found that for composites with a bent-shaped substance and polymethacrylate shape of the reflectance spectra do not change over time at room temperature. The prepared composites have a high potential for the different applications in photonics.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available