Dresden 2017 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 22: Poster session I
MM 22.26: Poster
Montag, 20. März 2017, 19:00–20:00, P4
Tuning of the optical properties from alloy nanoparticles with varied compositions sputtered from one target — •Wiebke Reichstein1, Alexander Vahl1, Julian Strobel2, Olexandr Polonskyi1, Thomas Strunskus1, Lorenz Kienle2, and Franz Faupel1 — 1Christian-Albrechts University at Kiel, Institute for Materials Science, Chair for Multicomponent Materials, Kaiserstr. 2, 24143, Kiel, Germany — 2Christian-Albrechts University at Kiel, Institute for Materials Science, Chair for Synthesis and Real Structure, Kaiserstr. 2, 24143, Kiel, Germany
Optical properties like particle plasmon polaritons of elemental noble metal nanoparticles were well studied over the past years. Recently, alloy metal nanoparticles have generated increasing interest due to their additional functionalities. In this work the optical properties of multiple stacks of silver-gold alloy nanoparticles in a transparent matrix are investigated. Nanoparticles were deposited using a Haberland type single DC magnetron gas-aggregation-source and are incorporated into a silicondioxide matrix (pulsed reactive DC magnetron sputtering). UV-vis transmission spectra were obtained on samples where the gold concentration in the nanoparticles was varied from 60 to 75 at% leading to corresponding shifts of the plasmon resonance peak positions. Furthermore, the influence of nanoparticle agglomeration on the appearance of the plasmon absorption band was analyzed which could allow optical control of the deposition process.