Zobrazeno 1 - 10
of 156
pro vyhledávání: '"D. C. Reynolds"'
Autor:
Antonio Crespo, T. C. Collins, A. Saxler, James K. Gillespie, T.J. Jenkins, J. E. Hoelscher, Cole W. Litton, R.D. Worley, Glen D. Via, D. C. Reynolds, Robert C. Fitch
Publikováno v:
physica status solidi (c). 2:2736-2739
Four (4) unique optical transitions are reported in both the emission and reflection spectra of high-quality AlGaN/GaN heterostructures. Study of the shifts of spectral peak energies and their intensity variations with temperature, reveal that these
Autor:
Jeff Nause, D. C. Reynolds, Cole W. Litton, Bruce B. Claflin, J. E. Hoelscher, David C. Look, T. C. Collins, B. Nemeth
Publikováno v:
Journal of Applied Physics. 95:4802-4805
High-quality, melt-grown ZnO crystals are reported. The reflection and emission spectra of the melt-grown samples are compared with the same spectra from high-quality, vapor-grown ZnO crystals. We isolate the reflection and emission spectra predomina
Autor:
D. C. Reynolds, J. E. Hoelscher, T. C. Collins, T.J. Jenkins, A. Saxler, G. D. Via, R. Fitch, Cole W. Litton, J. K. Gillespie, A. Crespo
Publikováno v:
Journal of Applied Physics. 94:4263-4266
Emission and reflection spectra from AlGaN/GaN single heterostructures grown on SiC substrates were investigated. Two-dimensional electron gas (2DEG) transitions were observed in both emission and reflection. The transitions are sharp, associated wit
Publikováno v:
Journal of Applied Physics. 88:5760-5763
The energy positions of the optical transitions in both GaN and ZnO were investigated when the samples were excited simultaneously with a HeCd laser and an Ar+ ion laser. The increased number of free electrons excited by the Ar+ ion laser will effect
Autor:
G. Cantwell, R. E. Sherriff, David C. Look, B. Jogai, W. C. Harsch, D. C. Reynolds, J. E. Hoelscher, T. C. Collins
Publikováno v:
Journal of Applied Physics. 88:3454-3457
The crystal structure of ZnO is wurtzite and the stacking sequence of atomic layers along the “c” axis is not symmetric. As a result, a ZnO crystal surface that is normal to the c axis exposes one of two distinct polar faces, with (0001) being co
Publikováno v:
Journal of Applied Physics. 88:1460-1463
High quality GaN crystals can be grown on sapphire by hydride vapor phase epitaxy. The thermal expansion mismatch between sapphire and GaN produces strain in the GaN crystal as it is cooled from the growth temperature to room temperature. The strain
Publikováno v:
Journal of Applied Physics. 83:260-265
A comprehensive characterization, including room temperature Hall effect, near infrared absorption, temperature dependent dark current and photocurrent (using 1.13 eV light), normalized thermally stimulated current (NTSC), photoluminescence at 4.2 K
Autor:
A. Botchkarev, Hadis Morkoç, Arnel Salvador, D. C. Reynolds, Ö. Aktas, Wook Kim, David C. Look
Publikováno v:
Journal of Applied Physics. 80:2960-2963
Molecular‐beam‐epitaxial GaN layers change from strongly conductive (ρ≂10−2 Ω cm at 300 K) to semi‐insulating (ρ≂106 Ω cm) as the N flux is increased. Layers grown at low fluxes show strong n‐type conduction, with transport in the c
Autor:
Cole W. Litton, D. C. Reynolds, T. Sota, Kouji Hazu, G. Cantwell, Shigefusa F. Chichibu, Satoru Adachi
Publikováno v:
Journal of Applied Physics. 96:1270-1272
The phase relaxation time of biexcitons T2bi and that of excitons T2ex in a bulk ZnO have been measured by the use of femtosecond four-wave mixing as functions of excitation wavelength, excitation power, and temperature. The biexciton-acoustic phonon
Publikováno v:
Physical Review B. 51:2572-2575