Coupling of the surface plasmon resonance with ferroelectricity in “DMAAlS crystal + silver nanoparticles” composite

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2022, Vol.128 (12), Article 1086
• Main Authors: Kapustianyk, V., Bolesta, I., Semak, S., Eliyashevskyy, Yu, Mostovoi, U., Kushnir, O., Turko, B., Rudko, M.
• Format: Article
• Language: English
• Subjects: Absorption spectra; Anomalies; Applied physics; Characterization and Evaluation of Materials; Comparative studies; Condensed Matter Physics; Coupling; Curie temperature; Dipoles; Electric fields; Ferroelectricity; Free electrons; Machines; Manufacturing; Materials science; Nanoparticles; Nanotechnology; Optical and Electronic Materials; Phase transitions; Physics; Physics and Astronomy; Processes; Silver; Single crystals; Surface plasmon resonance; Surfaces and Interfaces; Thin Films
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-022-06225-1

On the basis of comparative study of the morphology of silver nanoparticles deposited on a surface of single crystalline NH 2 (CH 3 ) 2 Al(SO 4 ) 2 × 6H 2 O (DMAAlS) and glass as well as of the absorption spectra of these composites the impact of the ferroelectric phase transition of the “order–disorder” type on the surface plasmon resonance (SPR) was investigated.The observed anomalies of the SPR band parameters were explained in terms of the resonance type coupling between the dipole clusters arising in a narrow region in vicinity of the Curie point and the free electrons within the silver nanoparticles. It was shown that such a coupling is followed by decreasing of these particles’ polarizability under the influence of a high frequency electric field of the propagating light photons. The mechanism of growth of the peculiar type of the silver nanoelements on the surface of DMAAlS single crystals—so-called nanowells—is proposed.