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Full-Text Articles in Engineering
Terahertz Emission From Mercury Cadmium Telluride, M. L. Smith, Rajind Mendis, R. E. M. Vickers, R. A. Lewis
Terahertz Emission From Mercury Cadmium Telluride, M. L. Smith, Rajind Mendis, R. E. M. Vickers, R. A. Lewis
Roger A. Lewis
THz-frequency electromagnetic radiation may be generated by illuminating a suitable target with short pulses of near-infrared radiation. We present results of experiments employing pulses of < 12 fs irradiating a HgCdTe thin film. The resulting THz emission was detected using a liquid-He–cooled bolometer. Strong azimuthal angle dependence on the generated THz power is observed. The THz power varies quadratically with the pump power.
Central-Cell Corrections For Si And S In Gaas In A Strong Magnetic Field, R. J. Heron, R. A. Lewis, Philip E. Simmonds, R. P. Starrett, A. V. Skougarevsky, R G. Clark, C. R. Stanley
Central-Cell Corrections For Si And S In Gaas In A Strong Magnetic Field, R. J. Heron, R. A. Lewis, Philip E. Simmonds, R. P. Starrett, A. V. Skougarevsky, R G. Clark, C. R. Stanley
Roger A. Lewis
The central-cell correction has been determined experimentally for the two donor impurities S and Si in GaAs. Data have been obtained for magnetic fields to 39 T, corresponding to γ~6. The observed behavior is in good agreement with theory. The analysis permits accurate evaluation of zero-field central-cell corrections, yielding 0.110 and 0.059 meV for S and Si, respectively.
Electroresistance Of Perovskite Manganites, D. C. Pond, R. A. Lewis
Electroresistance Of Perovskite Manganites, D. C. Pond, R. A. Lewis
Roger A. Lewis
A comprehensive delineation of current-voltage-temperature space is given for La0.66Sr0.33MnO3 and La0.8Li0.2MnO3. The first shows little electroresistance; the second exhibits marked electroresistance over a wide temperature range.