Detail publikace

Near-field study of hot luminescence centers in ZnS:Mn nanocrystals

Originální název

Near-field study of hot luminescence centers in ZnS:Mn nanocrystals

Anglický název

Near-field study of hot luminescence centers in ZnS:Mn nanocrystals

Jazyk

en

Originální abstrakt

The optical properties of impurities within nanocrystals embedded in glass or polymer matrix have been examined, and in particular of Mn2 in ZnS nanocrystals. Therefore we have provided a measurement in the optical near-field of local spatial distribution of luminescence by using SNOM microscope at emission peaks of materials at 585-595 nm, which is due to the luminescence of Mn2 in ZnS. The time-resolved emission spectra in nanocrystals exhibit a quite long decay time (order of microseconds rather than sub-nanoseconds for a bulk material), caused by the formation of hot spot centers. The slow relaxation of excited vibrational modes in nanocrystals could have a significant impact on possible future applications in large-area illumination devices and other nanoparticle device applications.

Anglický abstrakt

The optical properties of impurities within nanocrystals embedded in glass or polymer matrix have been examined, and in particular of Mn2 in ZnS nanocrystals. Therefore we have provided a measurement in the optical near-field of local spatial distribution of luminescence by using SNOM microscope at emission peaks of materials at 585-595 nm, which is due to the luminescence of Mn2 in ZnS. The time-resolved emission spectra in nanocrystals exhibit a quite long decay time (order of microseconds rather than sub-nanoseconds for a bulk material), caused by the formation of hot spot centers. The slow relaxation of excited vibrational modes in nanocrystals could have a significant impact on possible future applications in large-area illumination devices and other nanoparticle device applications.

BibTex


@misc{BUT60535,
  author="Lubomír {Grmela} and Pavel {Tománek}",
  title="Near-field study of hot luminescence centers in ZnS:Mn nanocrystals",
  annote="The optical properties of impurities within  nanocrystals embedded in glass or polymer matrix have been examined, and in particular of Mn2 in ZnS nanocrystals.
 Therefore we have provided a measurement in the optical near-field of local spatial distribution of luminescence by using SNOM microscope at emission peaks of materials at 585-595 nm, which is due to the luminescence of Mn2 in ZnS.
  The time-resolved emission spectra in nanocrystals exhibit a quite long decay time (order of microseconds rather than sub-nanoseconds for a bulk material), caused by the formation of   hot spot centers.  The slow relaxation of excited vibrational modes in nanocrystals could have a significant impact on possible future applications in large-area illumination devices and other nanoparticle device applications.",
  address="VUTIUM Brno",
  chapter="60535",
  institution="VUTIUM Brno",
  year="2007",
  month="june",
  pages="158--158",
  publisher="VUTIUM Brno",
  type="abstract"
}