| Autor: |
Sardar, Dhiraj K., Chandra, Sreerenjini, Gruber, John B., Gorski, Waldemar, Zhang, Maogen, Shim, Jun Ho |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; May2009, Vol. 105 Issue 9, p093105-1-093105-8, 8p, 1 Black and White Photograph, 3 Charts, 5 Graphs |
| Abstrakt: |
We describe a method to fabricate polymethyl methacrylate (PMMA), a polymeric host, in which nanocrystals of Nd3+:Y2O3 are suspended. The spectroscopic properties of this material are analyzed using the standard Judd–Ofelt technique. The phenomenological Judd–Ofelt intensity parameters are used to calculate the radiative decay rates and the branching ratios of the 4F3/2→4IJ (J=9/2, 11/2, 13/2, and 15/2) intermanifold transitions. The room temperature fluorescence lifetime has been measured for the most intense 4F3/2→4I11/2 emission transition. Emission cross sections for the intense intermanifold transitions and peak emission cross sections for the intense inter-Stark transitions are also reported. Assignments to individual Stark levels of the 4IJ manifolds have been made and compared with the calculated splittings reported earlier. Finally, the spectroscopic properties of the Nd3+:Y2O3 nanocrystals suspended in PMMA are compared with those of Nd3+ doped in various host materials. Detailed optical analysis led to favorable values of fluorescence lifetime and emission cross section for the 4F3/2→4I11/2 transition, which suggest that the Nd3+:Y2O3 nanocrystals embedded in PMMA would have potential for various photonic applications including laser systems and optical communication devices. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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