Picosecond nonlinear spectroscopy of quantum-size PbTe filmsстатья
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We propose a new and promising technique to study quantum-size structures. In ultrathin monocrystalline PbTe films with thicknesses L = 6, 18, and 30 nm, we have examined this technique, based on two-photon optical excitation of the renormalized electronic structure and revealed a sharp dependence of frequencies of two-photon resonant transitions on L. We explained this result within the framework of a model taking into account the real PbTe band structure, electron-electron and electron-phonon interactions, and interband and intraband redistribution of free carriers. We have estimated the characteristic time of interband polarization decay at T-2 greater than or equal to 300 fs and haved analyzed the transformation of the nonlinear response for the case L-->infinity. (C) 1996 American Institute of Physics.