Carrier dynamics and erbium sensitization in silicon-rich nitride nanocrystals

Li, R.; Schneck, J. R.; Warga, J.; Ziegler, L. D.; Dal Negro, L.
September 2008
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p091119
Academic Journal
Ultrafast two-color pump-probe measurements, time-resolved photoluminescence (TRPL), and photoluminescence excitation measurements were performed on Si-rich nitride (SRN) and Er doped SRN (Er:SRN) nanocrystals samples. Transient absorption data were compared with picosecond TRPL and excited state absorption cross (ESA) sections σ were measured at different wavelengths. Our data show that σ in Er:SRN, which is approximately 10-19 cm2 at 1.54 μm, does not scale with the ∼λ2 behavior predicted by simple free carrier absorption models. Finally, our data demonstrate that in Er:SRN efficient energy transfer to Er ions occurs on the nanosecond time scale with reduced ESA compared to Er-doped oxide-based systems.


Related Articles

  • Intensity-dependent enhancement of saturable absorption in PbS–Au4 nanohybrid composites: Evidence for resonant energy transfer by Auger recombination. Elim, Hendry I.; Ji, Wei; Yang, Jian; Yang Lee, Jim // Applied Physics Letters;6/23/2008, Vol. 92 Issue 25, p251106 

    Intensity-dependent enhancement of saturable absorption in a film of PbS–Au4 nanohybrid composites has been observed by femtosecond time-resolved transient absorption measurement at 780 nm. The nonlinear absorption coefficient (α2) of saturable absorption in PbS–Au4 nanohybrid...

  • Numerical Simulation of High-Density Plasma-Arc Processing of FePt Nanoparticle Films. Sabau, Adrian S.; Dinwiddie, Ralph B. // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Jun2006, Vol. 58 Issue 6, p35 

    This papers deals with the high-density plasma-arc processing of FePtnanoparticle films. For short processing times, different materials, and multiple length scales of the system considered, the estimation of the optimum combination of process parameters is a difficult task. The process...

  • JMR volume 30 issue 19 Cover and Front matter.  // Journal of Materials Research;Oct2015, Vol. 30 Issue 19, pf1 

    No abstract available.

  • Introduction. Redwing, Joan; Lences, Zoltan; Xie, Rong-Jun; Paskova, Tania // Journal of Materials Research;Oct2015, Vol. 30 Issue 19, p2845 

    An introduction is presented in which the editor discusses various reports within the issue on topics including nitride, oxynitride, and nanomaterials.

  • Luminescence and resonant energy transfer of two sizes of CdTe quantum dots embedded in gelatin films. Ling Xu; Jun Xu; Wei Li; Zhao Weiming; Ping Sun; Zhongyuan Ma; Xinfan Huang; Kunji Chen // Journal of Materials Science;Dec2007, Vol. 42 Issue 23, p9696 

    We have used two sizes of highly monodisperse colloidal CdTe nanocrystals (or quantum dots) and gelatin to form quantum dots (QDs)-gelatin films. Photoluminescence (PL) results for the mixed systems show that the quenching of the emission of the small dots was accompanied by the enhancement of...

  • Mechanosynthesis and Sintering of Ce1-xYxO2-γ (x ⩽ 0.35) Solid Solutions. FABIÁN, M.; BRIANČIN, J.; SCHUTZ, T. // Acta Physica Polonica, A.;2014, Vol. 126 Issue 4, p951 

    One-step mechanochemical approach was used to synthesize nanocrystalline Ce1-xYxO2-γ (x ⩽ 0.35) solid solutions. X-ray powder diffraction was utilized to characterize crystalline phases of as-prepared products. It was shown that the presence of yttrium suppresses the crystal growth. The...

  • Semiempirical Tight Binding Modeling of Electronic Band Structure of III-V Nitride Heterostructures. Gürel, H. Hakan; Akinci, Özden; Ünlü, Hilmi // AIP Conference Proceedings;2007, Vol. 893 Issue 1, p171 

    In this work, we discuss the composition and strain effects on the electronic band structure modeling of III-V nitrides heterostructures using the second nearest neighbor sp3s* semi-empirical tight binding theory. The model Hamiltonian includes the second nearest neighbor (2nn) interactions, the...

  • Polycrystalline iron nitride films fabricated by reactive facing-target sputtering: Structure, magnetic and electrical transport properties. Feng, X. P.; Mi, W. B.; Bai, H. L. // Journal of Applied Physics;Sep2011, Vol. 110 Issue 5, p053911 

    Structure, magnetic and electrical transport properties of the reactive sputtered iron nitride films fabricated at different substrate temperatures (Ts) and nitrogen flow rates (FN2) were investigated systematically. The single-phase polycrystalline γ′-Fe4N film was obtained at FN2 = 20...

  • Atomic resolution microscopy of nitrides in steel. Danielsen, Hilmar Kjartansson // Materials Science Forum;2014, Vol. 783-786, p1617 

    MN and CrMN type nitride precipitates in 12%Cr steels have been investigated using atomic resolution microscopy. The MN type nitrides were observed to transform into CrMN both by composition and crystallography as Cr diffuses from the matrix into the MN precipitates. Thus a change from one...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics