2000
DOI: 10.1103/physrevb.62.7459
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Generation and amplification of sub-THz coherent acoustic phonons under the drift of two-dimensional electrons

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Cited by 48 publications
(24 citation statements)
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“…Particularly, phenomena such as the high electron mobility and phonon confinement effects can considerably facilitate achieving phonon amplification and generation from drifting electrons. 10 Alternatively, if the current is due to the transitions of carriers between the bound-electron states ͑hopping transport͒, generation of coherent phonons can be realized if the population inversion of these states occurs. Similar effects for photon generation are demonstrated, for example, in cascade lasers.…”
Section: Introductionmentioning
confidence: 99%
“…Particularly, phenomena such as the high electron mobility and phonon confinement effects can considerably facilitate achieving phonon amplification and generation from drifting electrons. 10 Alternatively, if the current is due to the transitions of carriers between the bound-electron states ͑hopping transport͒, generation of coherent phonons can be realized if the population inversion of these states occurs. Similar effects for photon generation are demonstrated, for example, in cascade lasers.…”
Section: Introductionmentioning
confidence: 99%
“…A few methods for GHz-THz sound amplification have been proposed. Some have so far been explored only theoretically [8,9] and others have been explored only in noncoherent experiments [10,11]. In order to obtain much stronger evidence for coherent sound amplification by stimulated phonon emission, it is essential to use a detection technique that is sensitive to the coherent nature of the acoustic modes.…”
mentioning
confidence: 99%
“…The phonon amplification by means of the Cerenkov effect can be experimentally feasible thanks to the relevant practice of nanowires as quantum wires have been fabricated with radii as small as, or even smaller than, 16 nm [17]. Also, because of their relatively high mobility values (µ 1D ≥ 10 4 cm 2 V −1 s −1 ) the quantum wires are excellent candidates for the use of the Cerenkov effect in nanostructures [13,18,19].…”
Section: Introductionmentioning
confidence: 98%