Abstract

We used a confocal laser microscope to investigate the one-photon photoluminescence (PL) of gold antennas. The PL spectra can be precisely fitted to a plasmon-enhanced PL model. For increasing the antenna length, the energy peak position decreases continuously until it reaches a value of 1.7–1.8 eV. For longer antennas and smaller plasmon energies, we observe an additional, persistent shoulder in the PL spectra, which we explain by a Gaussian-shaped peak at ${\mathrm{\Delta }}_X\approx 1.78–1.79\mathrm{eV}$. We attribute this behavior to the opening of an additional decay path for electrons at the gold interband transition edge, which we observe only for long antennas.

© 2016 Optical Society of America

Two-photon luminescence properties of gold nanorods

Tianyi Wang, David Halaney, Derek Ho, Marc D. Feldman, and Thomas E. Milner
Biomed. Opt. Express 4(4) 584-595 (2013)

Surface plasmon effects on two photon luminescence of gold nanorods

Da-Shin Wang, Fu-Yin Hsu, and Chii-Wann Lin
Opt. Express 17(14) 11350-11359 (2009)

Gold nanorods as the saturable absorber for a diode-pumped nanosecond Q-switched 2  μm solid-state laser

Haitao Huang, Min Li, Pian Liu, Lin Jin, Hui Wang, and Deyuan Shen
Opt. Lett. 41(12) 2700-2703 (2016)

Infrared spectroscopy of molecules with nanorod arrays: a numerical study

Clément Tardieu, Grégory Vincent, Riad Haïdar, and Stéphane Collin
Opt. Lett. 41(8) 1744-1747 (2016)

Plasmonic structure: fiber grating formed by gold nanorods on a tapered fiber

J. O. Trevisanutto, A. Linhananta, and G. Das
Opt. Lett. 41(24) 5789-5792 (2016)