ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
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 as T2≥300 fs and have analyzed the transformation of the nonlinear response for the case L→∞. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.363075
