Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1547836 | Physica E: Low-dimensional Systems and Nanostructures | 2006 | 7 Pages |
Abstract
We analyze the Cerenkov emission of acoustic phonons by drifting electrons in a one-dimensional quantum well wire. We find that the electron drift can cause generation of strong acoustic phonons. A general formula for the attenuation coefficient α is obtained as a function of acoustic phonon frequency and drift velocity. Enhancement of amplification is found by considering lower dimensional structures. The attenuation coefficient increases sharply to maximum by increasing drift velocity of electrons in the short wave region. In GaAs Quantum well wire, it is shown that amplification coefficients can be achieved in the terahertz frequency range.
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Kasala Suresha, S.S. Kubakaddi, B.G. Mulimani, Shyi Long Lee,