Browsing SCHOOL OF PHYSICAL SCIENCE by Author "Allotey, F. K. A."

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Direct current generation due to wave mixing in zigzag carbon nanotubes

Abukari, S. S.; Mensah, S.Y.; Mensah, N. G.; Dompreh, K. A.; Twum, A.; Allotey, F. K. A. (University of Cape Coast, 2000)

Generation of direct current in zigzag carbon nanotubes due to harmonic mixing of two coherent electromagnetic waves is being considered. The electromagnetic waves have commensurate frequencies of Ω and Ω. The rectification ...
Generation of terahertz radiation by wave mixing in armchair carbon nanotubes

Mensah, S.Y.; Abukari, S. S.; Mensah, N. G.; Dompreh, K. A.; Twum, A.; Allotey, F. K. A. (University of Cape Coast, 2000)

Using semiclassical Boltzmann equation we have studied theoretically an effect of a direct current (DC) generation in undoped armchair carbon nanotube (CN) by mixing two coherent electromagnetic waves with commensurate ...
Ground state energy of a polaron in a superlattice

Mensah, S. Y.; Allotey, F. K. A.; Nkrumah, G.; Mensah, N. G. (University of Cape Coast, 2000)

The ground state energy of a polaron in a superlattice was calculated using the double-time Green functions. The effective mass of the polaron along the lanes perpendicular to the superlattice axis was also calculated. The ...

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