Zobrazeno 1 - 10
of 13
pro vyhledávání: '"J. V. D. Veliadis"'
SIZE VARIATION OF Tb-DOPED Gd2O3 NANOPARTICLES STUDIED BY X-RAY EXCITED LUMINESCENCE AND DIFFRACTION
Autor:
Yun-Liang Soo, Y. W. Yang, S. W. Huang, V. Chhabra, R. N. Bhargava, Y. H. Kao, L. J. Lai, B. Kulkami, J. V. D. Veliadis
Publikováno v:
Modern Physics Letters B. 15:205-211
Post-fabrication heat treatment has been found as an effective means for controlling the size distribution of Tb-doped Gd 2 O 3 nanoparticles. Variations in the electronic structure and structural order of these doped quantum dots are investigated by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f2cc3d9f22bf05263875e8385864b99
https://doi.org/10.1142/s021798490100163x
https://doi.org/10.1142/s021798490100163x
Publikováno v:
physica status solidi (b). 210:621-629
We report for the first time how the optical transitions associated with localized levels of a rare-earth impurity can be modulated by quantum confinement. The effect of quantum confinement on impurity critically depends on the size of the host cryst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39dc0ba0c7032c04148af279b721c95d
https://doi.org/10.1002/(sici)1521-3951(199812)210:2<621::aid-pssb621>3.0.co
https://doi.org/10.1002/(sici)1521-3951(199812)210:2<621::aid-pssb621>3.0.co
Autor:
R. N. Bhargava, G. C. Smith, E. Goldburt, Z. H. Ming, R. Hodel, J. V. D. Veliadis, Y. H. Kao, Yun-Liang Soo, B. Kulkarni, S. Huang
Publikováno v:
Journal of Applied Physics. 83:5404-5409
Pronounced structure in x-ray excited luminescence (XEL) has been observed in dilute Tb-doped Y2O3 (Y2O3:Tb) nanocrystals. This effect affords a means to assess different energy transfer mechanisms in the nanocrystals and also an opportunity for nove
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46a2ee7d4c5fa0be8ce0a9974db4bc2d
https://doi.org/10.1063/1.367996
https://doi.org/10.1063/1.367996
Autor:
Yujie J. Ding, A.G. Cui, O. Gorbounova, Seungjoon Lee, Kang L. Wang, J. V. D. Veliadis, Jacob B. Khurgin
Publikováno v:
Superlattices and Microstructures. 22:497-503
We report the observation of relative saturation among excitonic emission peaks at different sets of interface islands in growth-interrupted asymmetric-coupled quantum well GaAs/Al0.2Ga0.8As structures. The saturation is due to sequential filling of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30030a36ce16d6c1fa569baa77d056e3
https://doi.org/10.1006/spmi.1996.0435
https://doi.org/10.1006/spmi.1996.0435
Publikováno v:
IEEE Journal of Quantum Electronics. 32:1155-1160
The feasibility of the enhancement of the acoustic-phonon limited intersubband transition rate through impurity scattering has been theoretically investigated in double asymmetric-coupled quantum wells. The dependence of the acoustic-phonon rate on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::302efe9f704ed1dee33445b9731a67d9
https://doi.org/10.1109/3.517015
https://doi.org/10.1109/3.517015
Publikováno v:
Journal of Luminescence. 63:55-61
Continuous-wave intensity-dependent photoluminescence spectra of periodic four-narrow-asymmetric-coupled-quantum-well structures were measured at different temperatures. Above 215 K, the photoluminescence depends linearly on high pump laser intensiti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a2df44f31b5b950ed8ba93c9bfc06ba
https://doi.org/10.1016/0022-2313(94)00048-h
https://doi.org/10.1016/0022-2313(94)00048-h
Publikováno v:
Journal of Applied Physics. 75:1727-1732
We have investigated the dependence of the continuous‐wave photoluminescence on the laser intensity, which is affected by the trap saturation and the dominant nonradiative recombination in multiple intrinsic quantum wells. If the laser intensity is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9931d7701a86243e03eed3dc0086e449
https://doi.org/10.1063/1.356362
https://doi.org/10.1063/1.356362
Autor:
Yun-Liang Soo, V. Chhabra, R. N. Bhargava, Y. H. Kao, J. V. D. Veliadis, S. Huang, B. Kulkarni
Publikováno v:
Applied Physics Letters. 75:2464-2466
Local environment surrounding Y atoms in Y2O3:Tb nanocrystals under various heat treatment conditions has been investigated by using the extended x-ray absorption fine structure (EXAFS) technique. X-ray excited luminescence (XEL) with the incident x-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6c9d26714cbb11495650705b1d99e5e
https://doi.org/10.1063/1.125049
https://doi.org/10.1063/1.125049
Publikováno v:
Physical review. B, Condensed matter. 50(7)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc305dbe398158d78e05c9e5de292e9d
https://pubmed.ncbi.nlm.nih.gov/9976748
https://pubmed.ncbi.nlm.nih.gov/9976748
Publikováno v:
OSA Annual Meeting.
Recently, based on the intensity-dependent CW photoluminescence (PL) measurements [1], the nonradiative recombination at traps and the saturation of traps in multiple narrow undoped quantum wells (QWs) have been shown to play an important role.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::642ce9c5da72fbd54393ce263fd91175
https://doi.org/10.1364/oam.1993.muu.10
https://doi.org/10.1364/oam.1993.muu.10