Zobrazeno 1 - 10
of 17
pro vyhledávání: '"You Song Kim"'
Publikováno v:
Journal of the American Ceramic Society. 80:1485-1490
Blue up-conversion fluorescence from the Tm 3+ : 1 G 4 → 3 H 6 (480 nm) transition has been observed from calcium aluminate glass codoped with Tm 3+ /Nd 3+ , The mechanism for the up-conversion process consists of a two-photon process. An excitatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2256946d5277a5939ab7aabec0c618c2
https://doi.org/10.1111/j.1151-2916.1997.tb03007.x
https://doi.org/10.1111/j.1151-2916.1997.tb03007.x
Publikováno v:
Journal of the American Ceramic Society. 83:787-791
Emission properties of 2.0 μm fluorescence and the energy transfer between Ho3+ and Tm3+ in 57PbO·25Bi2O3·18Ga2O3 (mol%) glass codoped with Ho3+ and Tm3+ were investigated. Cross-relaxation rates in Tm3+ increased approximately 5 times when the Tm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5649e8246a8593ef9527e765a58a4e70
https://doi.org/10.1111/j.1151-2916.2000.tb01275.x
https://doi.org/10.1111/j.1151-2916.2000.tb01275.x
Publikováno v:
Journal of Non-Crystalline Solids. 278:137-144
Ge–Ga–As–S glasses were investigated to develop efficient host materials for the Er 3+ :2.7 μm fiber lasers. Ge30Ga1As9S60 and Ge30Ga2As6S62 (all in at.%) glasses show good thermal stability and high rare-earth solubility up to 0.3 mol%. Mid-i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfbf7658052cf2efde9ba0e966c2b5db
https://doi.org/10.1016/s0022-3093(00)00331-8
https://doi.org/10.1016/s0022-3093(00)00331-8
Publikováno v:
Journal of Applied Physics. 88:2515-2518
The 1.48-μm emission properties and electron population densities of the excited levels were investigated for Ge–As–Ga–S glasses doped with Tm3+ or Tm3+/Tb3+. Electron population inversion between the 3H4 and 3F4 levels in Tm3+ cannot be achie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f542e4c8969f6dabd63f8f2360f4ea1
https://doi.org/10.1063/1.1287523
https://doi.org/10.1063/1.1287523
Autor:
Weon Hyo Kim, You Song Kim
Publikováno v:
Optical Materials. 14:229-234
It is well known that the imperfections in thin film optical devices would cause absorption, radiation, and scattering loss of the guiding beam, and such losses are mostly unavoidable. To reduce the propagation loss, the conditions for film depositio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf52a5e19c485e68510138212b1515f0
https://doi.org/10.1016/s0925-3467(99)00142-1
https://doi.org/10.1016/s0925-3467(99)00142-1
Publikováno v:
Journal of Non-Crystalline Solids. 203:176-181
Ge 25 Ga 5 S 70 (at.%) glasses doped with Tm 3+ and Ho 3+ were prepared and their emission characteristics were evaluated with an emphasis on the 2.02 μm fluorescence from Ho 3+ : 5 I 7 5 I → 8 transition. With constant Ho 3+ concentration, intens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a71c8595aa31814672a41e374d543d91
https://doi.org/10.1016/0022-3093(96)00349-3
https://doi.org/10.1016/0022-3093(96)00349-3
Publikováno v:
Journal of the American Ceramic Society. 78:1285-1290
XPS Ols spectra were recorded for glasses in the binary PbO-Ga2O3 and ternary PbO-Bi2O3-Ga2O3 systems. Large shoulders with chemical shifts of 1.4 to 1.9 eV were observed in the Ols spectra recorded from PbO-Ga2O3 glasses. These shoulders were attrib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ff4ec52772d3975357d1032a91e1d48
https://doi.org/10.1111/j.1151-2916.1995.tb08483.x
https://doi.org/10.1111/j.1151-2916.1995.tb08483.x
Publikováno v:
Journal of Non-Crystalline Solids. 175:204-210
(CdAs2−xGex)0.8I0.2 (where x = 0.0–0.4) infrared transmitting glasses were prepared and the effect of Ge on their properties was investigated. The glass-transition temperature, Tg, of these iodide glasses is as high as 300°C which is considerabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4a45eecfc6078ac4b0ac77bf417a803
https://doi.org/10.1016/0022-3093(94)90012-4
https://doi.org/10.1016/0022-3093(94)90012-4
Autor:
You Song Kim
Publikováno v:
Materials Science and Engineering: A. 199:23-25
Research and development on materials has emerged globally from the urgency for advanced materials to meet the challenges of the 21st century. Research activities have been continuously intensified in both academic and research institutes around the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d20d310068d10a0e2e43d9fdc862546
https://doi.org/10.1016/0921-5093(95)09918-2
https://doi.org/10.1016/0921-5093(95)09918-2
Publikováno v:
SPIE Proceedings.
Chalcogenide and heavy metal oxide (HMO) glasses doped with various rare-earth elements have beenstudied for the possibility of developing new solid state laser materials to operate in the mid-infrared. Thisstudy investigates the synthesis and optica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::196118bb4c3f13fc9d876c7b412c7ef0
https://doi.org/10.1117/12.131356
https://doi.org/10.1117/12.131356