Now showing items 81-90 of 116
THz emission from coherently controlled photocurrents in GaAs
(The American Institute of Physics, 1999-12-20)
We report broadband terahertz radiation from ballistic photocurrents generated via quantum interference of one- and two-photon absorption in low-temperature-grown and semi-insulating GaAs at 295 K. For 90 fs, 1550 and 775 ...
The ROTSE detection of early optical light from GRB 990123
(The American Institute of Physics, 1999-12-15)
An overview is given of the Robotic Optical Transient Search Experiment, a ground-based observational astronomy project intended to detect visible radiation from gamma-ray bursts. The major result of the project was the ...
Force-deflection behavior of piezoelectric C-block actuator arrays
(IOP Publishing Ltd, 1999-10-01)
C-blocks are unique piezoelectric building blocks which can be combined in series or parallel to generate tailorable performance and exploit the advantages of bender and stack architectures. This paper presents a complete ...
Single quantum dot states measured by optical modulation spectroscopy
(The American Institute of Physics, 1999-11-08)
Using optical modulation spectroscopy, we report the direct observation of absorption lines from excitons localized in GaAs single quantum dot potentials. The data provide a measurement of the linewidth, resonance energy, ...
Etching effects during the chemical vapor deposition of (100) diamond
(The American Institute of Physics, 1999-09-01)
Current theories of CVD growth on (100) diamond are unable to account for the numerous experimental observations of slow-growing, locally smooth (100)(2×1)(100)(2×1) films. In this paper we use quantum mechanical calculations ...
Detailed dynamics of electron beams self-trapped and accelerated in a self-modulated laser wakefield
(The American Institute of Physics, 1999-12)
The electron beam generated in a self-modulated laser-wakefield accelerator is characterized in detail. A transverse normalized emittance of 0.06 π mm mrad, the lowest ever for an electron injector, was measured for 2 MeV ...
Effects of stress relaxation of epitaxial SrRuO3SrRuO3 thin film on microstructures
(The American Institute of Physics, 1999-10-15)
We report the effect of lattice stress relaxation on the microstructures of epitaxial thin films by domain structure studies of epitaxial SrRuO3SrRuO3 thin films grown on vicinal (001) SrTiO3SrTiO3 substrates. X-ray ...
A thermophysical study of the melting process in alkyl chain metal n-alkanoates: The thallium (I) series
(The American Institute of Physics, 1999-08-22)
The peculiar thermal behavior of the thallium(I) n-alkanoates series (consisting in several transitions between polymorphic and mesomorphic phases) in comparison with other metallic n-alkanoates series is stated. The ...
The Santa Barbara cluster comparison project: A comparison of cosmological hydrodynamics solutions
(Univ Chicago Press, 1999-11-10)
We have simulated the formation of an X-ray cluster in a cold dark matter universe using 12 different codes. The codes span the range of numerical techniques and implementations currently in use, including smoothed particle ...
Acceleration of electrons in a self-modulated laser wakefield
(The American Institute of Physics, 1999-07-12)
Acceleration of electrons in a self-modulated laser-wakefield is investigated. The generated electron beam is oberved to have a multi-component beam profile and its energy distribution undergoes discrete transitions as the ...