Ultrasonic Spray Coating as a Fast Alternative Technique for the Deposition of Hybrid Magnetic‐Plasmonic Nanocomposites

Abstract

Advanced applications in optics, for example, Faraday isolators, demand forcomplex magneto-plasmonic nanostructures which exhibit large Faradayrotation. These structures is fabricated by a Layer-by-Layer approach, albeitthis being a slow technique. Here, the ultrasonic spray coating as apromising alternative method toward the formation of hybrid magneto-plasmonic structures is pioneered by the authors. Ultrasonic spray coating isa stable, fast, and tunable mass production method applied in this work todeposit gold and iron oxide nanoparticles. Altering multiple depositionparameters give the spray coating technique a large amount of control overthe coverage. Optical and magneto-optical properties, layer formation andsurface coverage of single and hybrid layers with increasing thickness andnumber of layers are studied and compared to samples synthesized by Layer-by-Layer deposition. Ultrasonic spray coating paves the way to the wide-spread application of innovative and versatile hybrid magnetic-plasmonicnanocomposites