Methods of vacuum deposition and subsequent heat treatment of thin gold films are proposed, which allow one to obtain both extremely small gold nanoparticles with spectrally narrow dipole plasmon resonances and larger nanoparticles that support quadrupole vibrations. The effect of high-power laser radiation on both small and large metal nanoparticles in the regions of dipole and quadrupole resonances, respectively, was experimentally studied. Powerful laser irradiation leads to the ablation of small particles, while large particles decay into smaller particles during irradiation.
Quantum dots of indium gallium arsenide buried in a thin layer of aluminum gallium arsenide were grown by means of molecular-beam epitaxy. The influence of silver nanoparticles grown on the surface of the semiconductor structure by vacuum thermal evaporation on photoluminescence of quantum dots was investigated. Photoluminescence spectra of quantum dots were obtained under stationary and pulsed excitation. The influence of silver nanoparticles exhibiting plasmon resonances on spectral distribution and kinetics of luminescence of the epitaxial quantum dots was studied.
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