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Generation and amplification of confined acoustic phonons in a quantum wire via the Čerenkov effect
- Source :
-
Physics Letters A . Jul2005, Vol. 342 Issue 1/2, p181-187. 7p. - Publication Year :
- 2005
-
Abstract
- Abstract: We study the effect of generation and amplification of confined acoustic phonons by drifting electrons in an embedded quantum wire. A general formula for the phonon amplification coefficient α has been derived. Our calculations show that the quantum wire structure can be used for electrical generation of an intense high-frequency coherent phonon flux. The amplification coefficients of the order of cm−1 can be achieved in the sub-THz range for the example of Si0.5Ge0.5 quantum wires embeded in Si. [Copyright &y& Elsevier]
- Subjects :
- *NANOWIRES
*LATTICE dynamics
*PARTICLES (Nuclear physics)
*CATHODE rays
Subjects
Details
- Language :
- English
- ISSN :
- 03759601
- Volume :
- 342
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Physics Letters A
- Publication Type :
- Academic Journal
- Accession number :
- 18003938
- Full Text :
- https://doi.org/10.1016/j.physleta.2005.05.036