Comment on "Dispersive Terahertz Gain of a Nonclassical Oscillator: Bloch Oscillation in Semiconductor Superlattices"

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dc.creatorLisauskas, A.
dc.creatorDemarina, N. V.
dc.creatorMohler, E.
dc.creatorRoskos, H. G.
dc.date2006-05-26
dc.date.accessioned2026-07-07T07:09:13Z
dc.date.available2026-07-07T07:09:13Z
dc.descriptionIn two recent Letters [Phys. Rev. Lett. 90, 046806; Phys. Rev. Lett. 94, 057408], Hirakawa et al. investigate the emission of coherent terahertz (THz) radiation from optically excited superlattices. The authors interpret the spectra of the THz transients in terms of a semiclassical transport model and conclude that the data provide evidence for the existence of the so-called Bloch gain. We show that the interpretation of the data in terms of a conductivity is, however, not performed correctly, thus making the conclusions of cited authors void.
dc.descriptionsubmitted as a comment to PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/0605651
dc.identifierhttp://arxiv.org/abs/cond-mat/0605651
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/110980
dc.subjectMesoscale and Nanoscale Physics
dc.titleComment on "Dispersive Terahertz Gain of a Nonclassical Oscillator: Bloch Oscillation in Semiconductor Superlattices"
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