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Photoluminescence of Gold Nanorods: Purcell Effect Enhanced Emission from Hot Carriers.

Yi-Yu CaiJun G LiuLawrence J TauzinDa HuangEric SungHui ZhangAnneli JoplinWei-Shun ChangPeter J NordlanderStephan Link
Published in: ACS nano (2018)
We demonstrate, experimentally and theoretically, that the photon emission from gold nanorods can be viewed as a Purcell effect enhanced radiative recombination of hot carriers. By correlating the single-particle photoluminescence spectra and quantum yields of gold nanorods measured for five different excitation wavelengths and varied excitation powers, we illustrate the effects of hot carrier distributions evolving through interband and intraband transitions and the photonic density of states on the nanorod photoluminescence. Our model, using only one fixed input parameter, describes quantitatively both emission from interband recombination and the main photoluminescence peak coinciding with the longitudinal surface plasmon resonance.
Keyphrases
  • energy transfer
  • quantum dots
  • reduced graphene oxide
  • dna damage
  • dna repair
  • silver nanoparticles
  • solid state
  • high speed
  • mass spectrometry
  • cross sectional
  • oxidative stress
  • high resolution