Drude Relaxation Rate in Grained Gold Nanoantennas

Author

• Kuo-Ping Chen, Purdue University - Main CampusFollow
• V. P. Drachev, Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue UniversityFollow
• Joshua Borneman, Purdue University - Main CampusFollow
• Alexander V. Kildishev, Birck Nanotechnology Center, School of ECEFollow
• V. M. Shalaev, Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue UniversityFollow

Abstract

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 relfection coefficient. The electron relaxation rate due to the grains is shown to decrease by a factor of 3.2.

Keywords

Plasmonics; nanoantennas; electron relaxation race; grain structure; annealing

DOI

10.1021/nl9037246

Citation

Nano Lett., 2010, 10 (3), pp 916–922

Date of this Version

3-2010

Recommended Citation

Chen, Kuo-Ping; Drachev, V. P.; Borneman, Joshua; Kildishev, Alexander V.; and Shalaev, V. M., "Drude Relaxation Rate in Grained Gold Nanoantennas" (2010). Birck and NCN Publications. Paper 699.
http://dx.doi.org/10.1021/nl9037246