Nanoparticle Over Mirror plasmonic structures prepared with use of Au colloid produced by laser ablation in water

Mirosław Sawczak; Marcin Zyskowski; Jakub Karczewski; Petar A. Atanasov; Nikolay N. Nedyalkov; Rumen G. Nikov; Nadya A. Stankova; Gerard Śliwiński

doi:10.1117/12.2261918

5 January 2017 Nanoparticle Over Mirror plasmonic structures prepared with use of Au colloid produced by laser ablation in water

Mirosław Sawczak, Marcin Zyskowski, Jakub Karczewski, Petar A. Atanasov, Nikolay N. Nedyalkov, Rumen G. Nikov, Nadya A. Stankova, Gerard Śliwiński

Author Affiliations +

Proceedings Volume 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications; 102260G (2017) https://doi.org/10.1117/12.2261918
Event: International Conference and School on Quantum Electronics "Laser Physics and Applications" - ICSQE 2016, 2016, Sozopol, Bulgaria

Abstract

Recently, an intensive research is carried out on plasmonic structures due to their potential application in many areas such as sensing, light harvesting and energy conversion and storage. In particular, a growing interest is observed in the Nanoparticle Over Mirror (NOM) structures for which the lithography and surface chemical functionalization represent the most popular production routes¹. However, the application of those techniques is limited by the low efficacy, process complexity and chemical contamination of nanoparticles (NP). In this work, we report the contamination-free and low cost fabrication method of NOMs based on wet coating and ultrasonic-assisted nanocolloid drying process. The glass plates covered with magnetron sputtered 100 nm thick Au film and subsequently with Al₂O₃ layers (6 – 36 nm) by means of pulsed laser deposition are used as substrates. Au NPs are produced in the form of colloidal suspension by means of laser ablation in water using the 1064 nm, 6 ns Nd:YAG laser. The NOM synthesis is finalized by imposing of the Au NP suspension onto the as prepared Au-Al₂O₃/glass substrates and dried. To avoid NP agglomeration, the wet coated substrates are sonicated using 20W, 20 kHz ultrasound generator. SEM inspection of the obtained NOM structures confirms the positive sonication effect, i.e. the presence of agglomerate-free, homogenous layers. These consist of NPs (36 nm average diameter) which are characterized by the resonance absorption band at 528 nm. For NOM structures the UV-vis spectra reveal increased infrared activity and peak shift in agreement with theoretical modeling². The NOM structure characterization is completed by analysis of the SEM and profilometry measurement results.

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Mirosław Sawczak, Marcin Zyskowski, Jakub Karczewski, Petar A. Atanasov, Nikolay N. Nedyalkov, Rumen G. Nikov, Nadya A. Stankova, and Gerard Śliwiński "Nanoparticle Over Mirror plasmonic structures prepared with use of Au colloid produced by laser ablation in water", Proc. SPIE 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications, 102260G (5 January 2017); https://doi.org/10.1117/12.2261918

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