Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Nigel J. Cockroft"'
Publikováno v:
Physical Review B. 56:9302-9318
A spectroscopic investigation of an extensive series of ${\mathrm{Er}}^{3+}$-doped and ${\mathrm{Er}}^{3+}{,\mathrm{Y}\mathrm{b}}^{3+}$-codoped soda-lime-silicate (SL) and aluminosilicate (AS) glasses is presented. Compared to SL glasses, $4f$ transi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20e449620ba61a68c283dd23b5eb4f0c
https://doi.org/10.1103/physrevb.56.9302
https://doi.org/10.1103/physrevb.56.9302
Publikováno v:
The Journal of Chemical Physics. 105:9812-9822
Information obtained from optical absorption, excitation, and emission experiments on erbium doped crystalline CsCdBr3 is analyzed, using a semiempirical Hamiltonian, to calculate atomic and crystal‐field interaction parameters and electronic state
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59dad740768e1831a80179786a88c811
https://doi.org/10.1063/1.472850
https://doi.org/10.1063/1.472850
Autor:
Keith M. Murdoch, Nigel J. Cockroft
Publikováno v:
Physical Review B. 54:4589-4603
The property of preferential pair formation for trivalant ions in CsCdBr{sub 3} has been utilized to isolate and investigate energy cross-relaxation and upconversion processes of thulium and praseodymium. The principal pair centers formed by Tm{sup 3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6566fbfd120b6dba8e1e05fb1cf4d57b
https://doi.org/10.1103/physrevb.54.4589
https://doi.org/10.1103/physrevb.54.4589
Publikováno v:
Physical Review B. 51:5649-5658
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bef074514e347ab5a90d8cb4b6035d06
https://doi.org/10.1103/physrevb.51.5649
https://doi.org/10.1103/physrevb.51.5649
Autor:
Nigel J. Cockroft
Publikováno v:
Journal of Alloys and Compounds. :33-40
Energy-transfer and sequential-absorption upconversion processes, normally considered detrimental to conventional laser operation, are rapidly emerging as the key to an exciting new class of optical device. Energy-upconversion processes may be design
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::537ebb75399cce066184f6405fcd588b
https://doi.org/10.1016/0925-8388(94)90172-4
https://doi.org/10.1016/0925-8388(94)90172-4
Autor:
Keith M. Murdoch, Nigel J. Cockroft
Publikováno v:
Journal of Luminescence. :891-894
New thulium-to-praseodymium up-conversion and cross-relaxation energy transfer mechanisms are observed. YLiF 4 has several subsets of dopant ions, which exhibit a variety of transfer efficiencies. Dual-pulse laser excitation of dimers in CsCdBr 3 is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6ba12521bacacfd16ef99eebc5d604d
https://doi.org/10.1016/0022-2313(94)90305-0
https://doi.org/10.1016/0022-2313(94)90305-0
Autor:
John C. Wright, Nigel J. Cockroft
Publikováno v:
Physical Review B. 45:9642-9655
Site-selective spectroscopy of rare-earth-doped materials has proven to be a powerful method for investigating solid-state defect chemistry at the atomic level. In this paper, the spectral transitions of single-crystal and polycrystalline samples of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7454c6e8e1cccfcebe617d4211cbd264
https://doi.org/10.1103/physrevb.45.9642
https://doi.org/10.1103/physrevb.45.9642
Publikováno v:
Physical Review B. 45:5187-5198
Trivalent erbium ions in ${\mathrm{CsCdBr}}_{3}$ exist predominantly as dimers along one-dimensional lattice chains. Very efficient upconversion from near-infrared to various visible wavelengths was observed. $^{2}$${\mathit{H}}_{9/2}$${\ensuremath{\
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf8169307f752053bb11a2b15cd368b2
https://doi.org/10.1103/physrevb.45.5187
https://doi.org/10.1103/physrevb.45.5187
Publikováno v:
Physical Review B. 44:4117-4126
Identification des spectres des sites dominants qu'on attribue a la substitution par Eu 3+ sur des sites Sr avec une compensation de charge. Les spectres des echantillons non stœchiometriques montrent que la non-stœchiometrie est accommodee par la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4830d509d9409318430029c2e7b6add
https://doi.org/10.1103/physrevb.44.4117
https://doi.org/10.1103/physrevb.44.4117
Publikováno v:
Journal of Luminescence. :517-521
Spectroscopic and dynamic properties of Tm3+: YLiF4 as an upconversion material with blue emission are presented. Absorption, fluorescence and excitation spectra at low temperatures were used to determine the crystal field levels of all manifolds exc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e2b19c7fc7ef2a3d92910c2f22959f1
https://doi.org/10.1016/0022-2313(91)90183-v
https://doi.org/10.1016/0022-2313(91)90183-v