title: Luminescence quantum yield of single gold nanorods.
abstract: We study the luminescence quantum yield (QY) of single gold nanorods with different aspect ratios and volumes. Compared to gold nanospheres, we observe an increase of QY by about an order of magnitude for particles with a plasmon resonance >650 nm. The observed trend in QY is further confirmed by controlled reshaping of a single gold nanorod to a spherelike shape. Moreover, we identify two spectral components, one around 500 nm originating from a combination of interband transitions and the transverse plasmon and one coinciding with the longitudinal plasmon band. These components are analyzed by correlating scattering and luminescence spectra of single nanorods and performing polarization sensitive measurements. Our study contributes to the understanding of luminescence from gold nanorods. The enhanced QY we report can benefit applications in biological and soft matter studies.
authors: Institute of Physics, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands.
authors: Mustafa
authors: M
authors: Yorulmaz
authors: Saumyakanti
authors: S
authors: Khatua
authors: Peter
authors: P
authors: Zijlstra
authors: Alexander
authors: A
authors: Gaiduk
authors: Michel
authors: M
authors: Orrit