Zobrazeno 1 - 10
of 55
pro vyhledávání: '"R. N. Sacks"'
Publikováno v:
Journal of Electronic Materials. 27:900-907
The nucleation and growth of GaAs films on offcut (001) Ge wafers by solid source molecular beam epitaxy (MBE) is investigated, with the objective of establishing nucleation conditions which reproducibly yield GaAs films which are free of antiphase d
Publikováno v:
IEEE Photonics Technology Letters. 18:1898-1900
We discuss a new simple InGaAs-InAlAs avalanche photodiode (APD) with a planar buried multiplication region. Some of the advantages compared to standard APDs are as follows: 1) The thickness of the avalanche and the charge control regions are accurat
Publikováno v:
Journal of Crystal Growth. :256-261
The alloy system In 0.525 (Al x Ga 1-x ) 0.475 As, which is lattice-matched to InP, covers the technologically important wavelength range 0.8-1.6 μm, including the fiber optic communication wavelengths 1.3 and 1.55 μm. However, growth of these allo
Publikováno v:
Journal of Crystal Growth. :66-71
A novel PBN crucible has allowed the design of a new high-capacity Ga source incorporating a unique heat shielding cap. The extra heat shielding at the front of the source allows hot lip operation with considerably lower power than for previous desig
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 14:3283-3287
Large substrate surface temperature decreases are observed during molecular beam epitaxy growth onto small indium bonded substrates, due to coating of the molybdenum block. These large temperature transients, along with other difficulties associated
Publikováno v:
Surface Science. :537-541
We have studied electron heating in a 2DEG in GaAs/AlGaAs heterojunctions below 0.5 K. The electron temperature was raised above the lattice temperature using Joule heating. Weak localization and the temperature-dependent sample resistance were used
Autor:
R. N. Sacks, R. G. Wheeler, Daniel E. Prober, J. W. Sleight, H. Shtrikmann, Anurag Mittal, Mark W. Keller
Publikováno v:
Physical Review B. 53:R1693-R1696
We have fabricated ballistic cavities from a two-dimensional GaAs electron gas in which the Fermi energy can be varied independent of cavity shape. For each cavity, we have measured the magnetoconductance $G(B)$ of many individual members of an ensem
Publikováno v:
Surface Science. 305:501-506
We have measured the resistance versus magnetic field and Fermi energy for two stadium-shaped cavities in which chaotic scattering is expected. We fit the power spectra of the magnetoresistance fluctuations to semiclassical chaotic scattering theory
Autor:
Hongen Shen, R. N. Sacks, Peter G. Newman, Weimin Zhou, Doran D. Smith, Mitra Dutta, Jagadeesh Pamulapati
Publikováno v:
Physical Review B. 48:5256-5260
Low-temperature (4.2 K) magnetoreflectance measurements have been performed on a series of In x Ga 1-x As/Al y Ga 1-y As strained-layer quantum wells (QW's) with the InAs mole fraction x varying from 0 to 0.2, for three different well widths, and for
Publikováno v:
Solid State Communications. 84:51-55
We have investigated the effects of large uniaxial stress (⇀T) along [100] (≈10 kbar) and [110] (≈16 kbar) on the photoreflectance spectra at 300K of a (001) GaAs/Ga0.73Al0.27As single quantum well structure. For ⇀T‖[100] the stress-induced