Surface plasmon effects on two photon luminescence of gold nanorods.
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.
Wang
Da-Shin
DS
Institute of Biomedical Engineering, National Taiwan University, Taipei,Taiwan.
Hsu
Fu-Yin
FY
Lin
Chii-Wann
CW
D004583:Electrons; D004867:Equipment Design; D006046:Gold / Q000737:chemistry*; D008027:Light; D049449:Luminescence; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry; D010777:Photochemistry / Q000379:methods; D017785:Photons; D020349:Surface Plasmon Resonance / Q000379:methods*
D006046:Gold