Zobrazeno 1 - 10
of 106
pro vyhledávání: '"D.E. Wortman"'
Autor:
Kim Olver, D.E. Wortman, J.M. Gomes, C. J. Monroy, J. T. Pham, Frederick J. Towner, J.L. Bradshaw, John D. Bruno, Nicholas Breznay, Richard L. Tober
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 20:479-485
Type-II interband cascade lasers combine the advantage of an interband optical transition with interband tunneling to enable the cascading of type-II quantum well active regions as is done in type-I quantum cascade laser. The relatively high radiativ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61003f3773dbbb83921373946576c9c4
https://doi.org/10.1016/j.physe.2003.08.063
https://doi.org/10.1016/j.physe.2003.08.063
Publikováno v:
IEEE Journal of Quantum Electronics. 38:559-568
Interband cascade (IC) lasers that utilize optical transitions between the conduction and valence bands in a staircase of Sb-based type-II quantum wells (QWs) represent a new class of mid-IR diode lasers. By combining the advantages of quantum cascad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58add33c1c1cf54357e95eb75ee5394e
https://doi.org/10.1109/jqe.2002.1005406
https://doi.org/10.1109/jqe.2002.1005406
Publikováno v:
IEEE Journal of Quantum Electronics. 37:282-289
High-performance mid-infrared type-II interband cascade lasers have been demonstrated under continuous-wave (CW) conditions with record-high wall-plug efficiencies (>14%) and output powers (>100 mW/facet) above 77 K. Device characteristics of these t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::135a7dff19f2336f6127382ad2c51b85
https://doi.org/10.1109/3.903079
https://doi.org/10.1109/3.903079
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 7:102-105
Continuous-wave (CW) operation of a mid-infrared type-II interband cascade (IC) laser has been demonstrated at temperatures up to 142 K by improving device processing and fabrication. Also, the IC laser exhibited record-high wall-plug efficiencies (/
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e01b0cd14c9fa75cfd7fa61a9ee5cf4
https://doi.org/10.1109/2944.954117
https://doi.org/10.1109/2944.954117
Publikováno v:
IEE Proceedings - Optoelectronics. 147:177-180
Continuous wave operation of interband cascade lasers based on type-II InAs/Ga(In)Sb heterostructures is reported. The interband cascade lasers, consisting of 23 cascaded active regions, lased at wavelengths near 4 /spl mu/m. Continuous wave operatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0284488f945207a51dd895eb7e1fb772
https://doi.org/10.1049/ip-opt:20000299
https://doi.org/10.1049/ip-opt:20000299
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 7:69-75
Interband cascade (IC) lasers take advantage of the broken-gap alignment in type-II InAs/Ga(In)Sb heterostructures to reuse electrons for sequential photon emissions from successively connected active regions; thus, they represent a new class of mid-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c2efd2f5a448d5223c4ff75549176b3
https://doi.org/10.1016/s1386-9477(99)00280-5
https://doi.org/10.1016/s1386-9477(99)00280-5
Publikováno v:
Optical Materials. 7:117-128
The spectroscopic characteristics of triply ionized neodymium in Sr1−xNdxAl12−xMgxO19 for x = 0.03 and 0.15 are presented; one Mg2+ ion per Nd3+ is required for charge compensation. Crystals of this composition are optically uniaxial, with absorp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb777a853888eec78fc163d7d4846250
https://doi.org/10.1016/s0925-3467(97)00002-5
https://doi.org/10.1016/s0925-3467(97)00002-5
Autor:
Michael D. Seltzer, Clyde A. Morrison, Elizabeth D. Filer, John B. Gruber, D.E. Wortman, Andrew O. Wright
Publikováno v:
Journal of Physics and Chemistry of Solids. 57:1175-1182
Absorption spectra of trivalent dysprosium ions in yttrium scandium gallium garnet are reported between 2.9 and 0.4 μn at 4K. Laser-excited fluorescence was observed at 4 K for transitions between the 4 F 9 2 manifold and several of the lower-lying
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::faca885e2681cf1f871f2ed65234e7fb
https://doi.org/10.1016/0022-3697(95)00248-0
https://doi.org/10.1016/0022-3697(95)00248-0
Autor:
Clyde A. Morrison, D.E. Wortman
Publikováno v:
Optical Materials. 4:487-505
Reported optical spectra of Mn2+-doped halo apatites are analyzed in octahedral, cubic, and C3 symmetries. Specifically the apatites doped with Mn2+ are Ca10F2(PO4)6, Cd10Cl2(PO4)6, Ca10F1.8Cl0.2(PO4)6, and Sr10F1.8Cl0.2(PO4)6. The cubic approximatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6fc8ef4e9a731c12fda7057cdbf7a506
https://doi.org/10.1016/0925-3467(94)00124-3
https://doi.org/10.1016/0925-3467(94)00124-3
Autor:
C.A. Morrison, D.E. Wortman
Publikováno v:
Optical Materials. 1:195-207
A crystal-field hamiltonian for octahedral symmetry was used along with free-ion parameters for aqueous solution to fit the reported optical absorption spectra of Er3+ in ErAs. Parameters obtained from this fit were then used in a model to predict op
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc38f06a68a3336c26c9673d72a5f1f3
https://doi.org/10.1016/0925-3467(92)90028-l
https://doi.org/10.1016/0925-3467(92)90028-l