Drude Relaxation Rate in Grained Gold Nanoantennas

The effect of grain boundaries on the electron relaxation rate is significant even for large area noble metal films and more so for plasmonic nanostructures. Optical spectroscopy and X-ray diffraction show a substantial improvement in plasmon resonance quality for square-particle nanoantennas after...

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Veröffentlicht in:	Nano letters 2010-03, Vol.10 (3), p.916-922
Hauptverfasser:	Chen, Kuo-Ping, Drachev, Vladimir P, Borneman, Joshua D, Kildishev, Alexander V, Shalaev, Vladimir M
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Crystallization - methods Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronics Exact sciences and technology Gold - chemistry Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties Materials Testing Molecular electronics, nanoelectronics Nanostructures - chemistry Nanostructures - ultrastructure Nanotechnology - methods Particle Size Physics Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Surface and interface electron states Surface Plasmon Resonance - methods Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Zusammenfassung:	The effect of grain boundaries on the electron relaxation rate is significant even for large area noble metal films and more so for plasmonic nanostructures. Optical spectroscopy and X-ray diffraction show a substantial improvement in plasmon resonance quality for square-particle nanoantennas after annealing due to an enlarged grain size from 22 to 40 nm and improved grain boundaries described by the electron reflection coefficient. The electron relaxation rate due to the grains is shown to decrease by a factor of 3.2.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl9037246