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

被引：0
作者：
V. Kapustianyk
I. Bolesta
S. Semak
Yu. Eliyashevskyy
U. Mostovoi
O. Kushnir
B. Turko
M. Rudko
机构：
[1] Ivan Franko National University of Lviv,Faculty of Physics
[2] Ivan Franko National University of Lviv,Faculty of Electronics and Computer Technologies
[3] Institut de Physique Et Chimie Des Matériaux de Strasbourg,undefined
[4] UMR 7504,undefined
来源：
Applied Physics A | 2022年 / 128卷
关键词：
Ferroelectric; Surface plasmon resonance; Absorption spectra; Atomic force microscopy; Silver nanoparticles;
D O I：
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摘要：
On the basis of comparative study of the morphology of silver nanoparticles deposited on a surface of single crystalline NH2(CH3)2Al(SO4)2 × 6H2O (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.
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