Optical properties of gold nanorods macro-structure: a numerical study

Arthur Gontier, J. Marae-Djouda, R. Caputo, Y. Madi, M. Molinari, G. Léveque, P.-M. Adam, T. Maurer


In this contribution, a numerical study of the optical properties of closely-packed gold nanorods was performed. The studied nano-objects are experimentally grown on a tilted polydimethylsiloxane (PDMS) substrate by using physical vapor deposition (PVD). This method creates nanorods tilted to a certain angle with respect to the substrate normal. This geometry allows exciting both transverse and longitudinal modes of the rods. As demonstrated in a previous experimental work, such PVD-grown nano-objects show promising possibilities both as strain gauges or strain-tunable metamaterials if fabricated on a stretchable dielectric substrate. This numerical study is based on experimental data from previous work and pushes further the subject by approaching an optimized nano-structure allowing better strain-sensitivity (particularly by changing the auto-organization of the said nanorods).

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Photonics Letters of Poland - A Publication of the Photonics Society of Poland
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ISSN: 2080-2242