Photoinduced split of the cavity mode in photonic crystals based on porous silicon filled with photochromic azobenzene-containing substances

0562806 - FZÚ 2023 RIV US eng J - Journal Article
Bobrovsky, A.Y. - Svyakhovskiy, S. - Roslyakov, I.V. - Piryazev, A.A. - Ivanov, D.A. - Shibaev, V.P. - Cigl, Martin - Hamplová, Věra - Bubnov, Alexej
Photoinduced split of the cavity mode in photonic crystals based on porous silicon filled with photochromic azobenzene-containing substances.
ACS Applied Polymer Materials. Roč. 4, č. 10 (2022), s. 7387-7396. ISSN 2637-6105. E-ISSN 2637-6105
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GC20-22615J; GA MŠMT LTC19051
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : liquid crystals * cavity mode * azo group * photo-active materials * porous silicon * self-organizing materials
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 5, year: 2022
Method of publishing: Limited access
https://doi.org/10.1021/acsapm.2c01149

The novel phototunable photonic structures based on electrochemically etched silicon filled with four photochromic azobenzene-containing compounds, bent-shaped low molar mass substance and side-chain polymethacrylates and copolyacrylate, were prepared and their photooptical properties were studied. It was found that irradiation of these composites with polarized blue light results in spectral changes in photonic band gap (split of the cavity mode) associated with cooperative photoorientation of azobenzene moieties inside silicon pores in direction perpendicular to the polarization plane of the incident light. The observed phototoinduced split is fully reversible. Thermal and temporal stability of the obtained photoinduced split were comparatively studied. The prepared composites have high potential for the different applications in photonics.
Permanent Link: https://hdl.handle.net/11104/0335147