Zobrazeno 71 - 80
of 526
pro vyhledávání: '"77"'
Autor:
George V. Negrete, Robert B. Hammond
Publikováno v:
SPIE Proceedings.
Microwave data on epitaxial Tl2Ba2CaCu2O8 thin films grown on LaAlO3 substrates are reported. The authors fabricated and tested microstrip resonators using these films and performed measurements of the loss tangent of lanthanum aluminate substrates a
Autor:
David K. Fork, James B. Boyce, G.A. N. Connell, Theodore H. Geballe, David B. Fenner, Julia M. Phillips, Nathan Newman, A. Barrera
Publikováno v:
SPIE Proceedings.
Efforts to grow high quality films of YBCO on Si have been complicated by factors discussed in Ref. 1, chief among them being the reaction between YBCO and Si, which is damaging even at 550 C. This is well below the customary temperatures for YBCO fi
Publikováno v:
SPIE Proceedings.
Current-voltage characteristics of a resonant tunneling diode are studied by including the effects of the conservation of transverse momentum at the heterojunction interfaces, energy-band nonparabolicity, and the temperature dependence of effective m
Publikováno v:
SPIE Proceedings.
Upconversion has been an active area of research for at least two decades, mainly because of its wide ranging applications from infrared quantum counters, visible-emitting phosphors, to upconversion lasers. The upconversion lasers have recently becom
Autor:
Antonio Mogro-Campero
Publikováno v:
SPIE Proceedings.
Work on high temperature superconductor films on silicon is reviewed. High temperature superconductor thin films of YBa2Cu3O7-x, (YBCO) have been made on single crystal SrTiO3 with zero resistance transition temperatures(Tc) of 90 K and critical curr
Publikováno v:
SPIE Proceedings.
High Tc superconductor films were prepared by laser deposition. Epitaxial YBaCuO films with high critical current density are obtained for a uniform laser beam energy density of about 4 J/cm2, a substrate temperature above 730°C and an oxygen pressu
Autor:
R. J. Houlton, D. W. Cooke, M. S. Jahan, M. A. Maez, Bryan L. Bennett, J. G. Beery, G. A. Reeves, A. J. Klapetzky, I. D. Raistrick, E. R. Gray, B. Rusnak, Paul N. Arendt, D. R. Brown
Publikováno v:
SPIE Proceedings.
Thick (10-15 µm) Tl-Ba-Ca-Cu-O films have been deposited onto yttria-stabilized zirconia and Ag substrates by d.c. magnetron sputtering techniques. Direct deposition onto 1" diameter yttria-stabilized zirconia yields films with typical 22-GHz surfac
Autor:
Artur Trajnerowicz, Marek Wzorek, Maciej Kuc, Norbert Palka, Renata Kruszka, Kamil Kosiel, Michał Walczakowski, Piotr Karbownik, Tomasz Czyszanowski, Anna Szerling, Krystyna Gołaszewska
Publikováno v:
SPIE Proceedings.
Conditions of fabrication of first order distributed-feedback surface gratings designed for single-mode Al 0.45 Ga 0.55 As/GaAs quantum cascades lasers with the emission wavelength of about 10μm are presented. The 1 μm-deep rectangular-shaped grati
Autor:
Jae Cheol Shin, Luke J. Mawst, Dan Botez, Thomas Earles, Jeremy Kirch, Gun-Kim Doo, D. Lindberg, K. Oresick, C. Boyle, Chun Chieh Chang, Minhyeok Jo, Honghyuk Kim, C. Sigler
Publikováno v:
SPIE Proceedings.
Implementation of the step-taper active-region (STA) design to 8-9 μm-emitting quantum cascade lasers (QCLs) has resulted in both high T0 and T1 values: 220 K and 665 K, and short lower-level lifetimes: 0.12 ps. In turn, the internal differential ef
Publikováno v:
SPIE Proceedings.
Silicon-germanium (SiGe) bipolar complementary metal-oxide semiconductor (BiCMOS) transistors have vertical doping profiles reaching deeper into the substrate when compared to lateral CMOS transistors. Apart from benefiting from high-speed, high curr