Zobrazeno 1 - 10 of 48 pro vyhledávání: '"J. M. Langer"'
1
Optical detection of electron transfer through interfaces in CaF2:Eu–CdF2 SLs
Autor: Sergey M. Suturin, S. V. Gastev, S.A. Basun, Richard S. Meltzer, N. S. Sokolov, J. M. Langer
Publikováno v: Applied Surface Science. :474-478
We present here a further study of unusual features observed in photoluminescence (PL) of Eu2+ in CaF2 layers of CaF2–CdF2 SLs (SLs) [N.S. Sokolov, S.V.Gastev, A.Yu. Khilko, S.M. Suturin, I.N. Yassievich, J.M. Langer, A. Kozanezcki, Phys.Rev B 59 (
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7601ee39413c9144bfa87dcd22c961b1
https://doi.org/10.1016/s0169-4332(00)00236-1
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2
Energy transfer between shallow centers and rare-earth ion cores:Er3+ion in silicon
Autor: Tom Gregorkiewicz, M. S. Bresler, H.H.P.Th. Bekman, J. M. Langer, D. T. X. Thao, Jurgen Michel, Lionel C. Kimerling
Publikováno v: Physical Review B. 61:5369-5375
Two-color optical spectroscopy is used to directly manipulate shallow levels available in Si:Er samples of different parameters. It is observed that the excitation energy provided by a laser operating in the visible can be temporarily stored by trapp
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72f5aa2ae2b6437056648713e6d8a2d5
https://doi.org/10.1103/physrevb.61.5369
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3
Tracking Recombination Processes in Si:Er with a Free-Electron Laser
Autor: J. M. Langer, D. T. X. Thao, Tom Gregorkiewicz, H.H.P.Th. Bekman
Publikováno v: Journal of Luminescence, May, s 87-89, 96-100
Journal of Luminescence, 87-89, 96-100. Elsevier
Two-color optical spectroscopy is used to directly manipulate shallow levels available in Si:Er samples of different parameters. It is shown that Er photoluminescence can be quenched with a free-electron laser pulse applied shortly after the band-to-
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2efa2de13cf760589c6ef51a0ec23570
https://doi.org/10.1016/S0022-2313(99)00237-9
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4
Evidence on a bond-breaking relaxation in the bistable centers In and Ga in CdF2
Autor: Kimmo Saarinen, Andrzej Suchocki, J. Nissilä, P. Hautojärvi, J. M. Langer
Publikováno v: Physica B: Condensed Matter. :915-918
Positron annihilation experiments reveal an open-volume defect in the deep state atomic configurations of bistable donors In and Ga in CdF 2 . The size of the open volume is at least half of a monovacancy. The results are similar to those obtained pr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36bf83eccd41b5d79a7f1dfaaaba39c3
https://doi.org/10.1016/s0921-4526(99)00553-0
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5
Lasing in Rare-Earth-Doped Semiconductors: Hopes and Facts
Autor: Tom Gregorkiewicz, J. M. Langer
Publikováno v: MRS Bulletin, 24(9), 27-31. Cambridge University Press
Semiconductors doped with rare-earth (RE) elements have attracted a lot of attention as alternative materials for producing electrically pumpe d semiconductor lasers whose emission wavelength is very weakly dependent on temperature. This prospect is
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::635d7a82d4ab0e3f522ba88ec670ec84
https://doi.org/10.1557/s0883769400053033
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6
Universality of the Bond-Breaking Mechanism in Defect Bistability: Observation of Open Volume in the Deep States of In and Ga inCdF2
Autor: Kimmo Saarinen, J. M. Langer, P. Hautojärvi, A. Suchocki, J. Nissilä
Publikováno v: Physical Review Letters. 82:3276-3279
Positron annihilation experiments reveal an open-volume defect in the deep state atomic configurations of bistable donors In and Ga in CdF2. The size of the open volume is at least half of a monovacancy. The results are similar to those obtained prev
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9d89929eb1d1b65d7049415ae9a92437
https://doi.org/10.1103/physrevlett.82.3276
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8
Spectroscopic Probing of Defect-Related Energy Storage in Silicon Doped with Erbium
Autor: J. M. Langer, Tom Gregorkiewicz, D. T. X. Thao
Publikováno v: Physica B-Condensed Matter, 273-274, 326-329. Elsevier
An enhancement of 1.5 μm Si : Er photoluminescence by a mid-infrared pulse from a free-electron laser is investigated in detail. It is concluded that the effect is a consequence of defect-related energy storage in Si : Er samples. Carriers generated
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be62238f2e66184bd74d164248cc36ed
https://doi.org/10.1016/S0921-4526(99)00467-6
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9
Image holography in CdF2:Ga crystals
Autor: Luis Arizmendi, J. M. Langer, Andrzej Suchocki, B. Koziarska-Glinka
Publikováno v: Optical Materials. 10:313-318
The recording of an image hologram in CdF 2 :Ga crystals at room temperature is reported. Writing the phase holographic pattern utilizes a unique property of Ga and In doped CdF 2 crystals, namely, the bistability of these dopants. In contrast to CdF
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f9392c1035d6f62f435c5b869925d803
https://doi.org/10.1016/s0925-3467(98)00007-x
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10
Light-Induced Gratings in CdMnTeSe:In Crystals
Autor: M. Ponder, B. Koziarska-Glinka, Ireneusz Miotkowski, Tomasz Wojtowicz, J. M. Langer, Andrzej Suchocki
Publikováno v: Acta Physica Polonica A. 92:883-886
We show tlat DX-like centers in Cd1-xMnxΤe1-ySex:In crystal can be used in writing volume holographic gratings. Tle scattering efficiency is higher than 10% which proves the dispersive character of the light-induced gratings. Two different metastabl
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::308ff73f21f492ff16bac046c374e820
https://doi.org/10.12693/aphyspola.92.883
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