Amplification of acoustic phonons in a degenerate semiconductor superlattices

dc.contributor.author	Mensah, S.Y.
dc.contributor.author	Allotey, F.K.A.
dc.contributor.author	Mensah, N.G.
dc.contributor.author	Eloh, V.W.
dc.date.accessioned	2021-10-04T11:17:49Z
dc.date.available	2021-10-04T11:17:49Z
dc.date.issued	2002
dc.identifier.issn	23105496
dc.identifier.uri	http://hdl.handle.net/123456789/6112
dc.description	18p:, ill.	en_US
dc.description.abstract	Amplification of acoustic phonons propagating along the axis of a semiconductor superlattice (SL) is investigated using the microscopic theory. A non-quantizing electric field is applied to the S to produce a drift velocity VD f the charge carriers and whenever VD exceeds v (sound velocity) amplification occurs. The threshold field EOat which absorption switches over to amplification depends on the SL, parameters and v It is noted that E in SL is by far lower than that in bulk semiconductor and that there exists the possibility of finding a field E* such that-JF(E)Ž F7(-E). This allows in principle the use of SL, as hypersound generator	en_US
dc.language.iso	en	en_US
dc.publisher	University of Cape Coast	en_US
dc.title	Amplification of acoustic phonons in a degenerate semiconductor superlattices	en_US
dc.type	Article	en_US