5 March 2013 Tuning of optical properties by atomic layer deposition
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Abstract
A combination of deposition strategies was applied in order to synthesize Au nanoparticle chains embedded in helical Al2O3 nanotubes (“nanopeapods”). Carbon nanocoils were grown by chemical vapour deposition and coated with Au by sputtering with a subsequent Al2O3 coating by atomic layer deposition. Rayleigh instabilities were made use of in order to fragment the Au coating into nanoparticles with a sharp size distribution. The pitch of the nanocoils arising from three-dimensional periodical topography of the carbon nanocoil templates induced a regular spacing between the nanoparticles. The nanoparticle chains show a strong plasmonic resonance behaviour visible as clear polarization contrast at red wavelengths, which is absent in the blue upon excitation with a confocal laser scanning microscope. The fabricated nanopeapods are suggested promising candidates for highly efficient, ultrathin waveguides.
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Y. Qin, Y. Qin, R. Vogelgesang, R. Vogelgesang, M. Eßlinger, M. Eßlinger, M. Knez, M. Knez, } "Tuning of optical properties by atomic layer deposition", Proc. SPIE 8613, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics VI, 86130B (5 March 2013); doi: 10.1117/12.2003613; https://doi.org/10.1117/12.2003613
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