Open AccessSurface plasmon effects on two photon luminescence of gold nanorods
Author(s) -
Da-Shin Wang,
FuYin Hsu,
Chii-Wann Lin
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.011350
Subject(s) - nanorod , surface plasmon , plasmon , materials science , photoluminescence , localized surface plasmon , surface plasmon resonance , optics , spontaneous emission , luminescence , optoelectronics , excited state , nanotechnology , atomic physics , physics , nanoparticle , laser
Gold nanorods emit strong photoluminescence under two photon excitation; the efficient two photon lumininescence (TPL) arises from the local field enhancement assisted by surface plasmons. The surface plasmon effects on the TPL efficiency and spectrum are investigated by measuring the TPL of gold nanorods with various aspect ratios. A large TPL efficiency is found when incident light wavelength coincides with the longitudinal surface plasmon mode of the gold nanorods. However, the emission spectra of nanorods with various aspect ratios look similar and exhibit modest surface plasmon features, which implies a major non-radiative decay of excited surface plasmons.