Now showing items 101-110 of 1507
Amplification of 1 ps pulses at 1.053 [mu]m in a Ti:Al2O3 regenerative amplifier
(Elsevier, 1991-07-01)
We demonstrate the operation of a Ti:Al2O3 regenerative amplifier tunable around 1 [mu]m. Gains up to 108 at 1.053 [mu]m without any spectral narrowing are obtained. This amplifier is designed for use in terawatt picosecond ...
Linear electro-optic effect due to the built-in electric field in InGaN/GaN quantum wells
(The American Institute of Physics, 1999-09-27)
A strong piezoelectric effect and large lattice mismatch allow one to incorporate high built-in electric fields in InGaN/GaN quantum wells. This letter examines the implications of these fields on the absorption spectra ...
Structure of the propene⋅sulfur dioxide complex
(The American Institute of Physics, 1994-01-01)
The rotational spectra of eight isotopomers of the propene⋅SO2 complex have been observed with a Fourier transform microwave spectrometer. The rotational constants of the normal species are A=4269.564 MHz, B=1577.2661 MHz, ...
Vibrational relaxation of highly excited toluene
(The American Institute of Physics, 1991-07-01)
The collisional loss of vibrational energy from gas‐phase toluene, pumped by a pulsed KrF laser operating at 248 nm, has been observed by monitoring the time‐resolved infrared fluorescence from the C–H stretch modes near ...
Investigation of the reaction between 1 and 13 MeV
(Springer-Verlag, 1990-06)
High-precision measurements of the cross section, the vector analyzing power iT 11 and the three tensor-analyzing powers T 20 , T 21 , and T 22 of the 3 He( d, p ) 4 He reaction have been performed in the energy range ...
Upper bound on the free energy of the spin 1/2 Heisenberg ferromagnet
(Kluwer Academic Publishers; Springer Science+Business Media, 1991-11)
The authors obtain an upper bound on the free energy of the spin 1/2 Heisenberg ferromagnet. The zero field bound is, at low temperature, similar to the formula given by the magnon approximation. That is, its functional ...
Limitations on ultrafast optical switching in a semiconductor laser amplifier operating at transparency current
(The American Institute of Physics, 1999-11-01)
Ultrafast optical switching in a semiconductor laser amplifier (SLA) at transparency current is studied under a strong pump condition. The switch configuration is a nonlinear optical loop mirror with a SLA as the nonlinear ...
Qualitative dynamics of planar chains
(Elsevier, 1992-01-01)
In this paper we derive the equations of motion and analyze some aspects of the dynamics of planar chains. We show that (a) for any integer vector n=(n1,...,nN) (where N is the number of joints) there exists a periodic ...
Earthquake source processes and subduction regime in the Santa Cruz Islands region
(Elsevier, 1990)
The source process of two large earthquakes that occurred in the Santa Cruz Islands subduction zone has been studied, one with a surface wave magnitude MS = 7.9 in 1966 and the other with MS = 7.7 in 1980. The seismic ...
Solenoid and sextupole optics of ultra-cold atomic hydrogen beams
(Elsevier, 1993-06-20)
Analytic calculations and particle tracking simulations are presented for a polarized atomic hydrogen beam produced by extraction from a superfluid helium coated cell in a large solenoidal magnetic field. Compression of ...