Abstract
The interaction between electron excitations and LO phonons was studied by Raman scattering in \ensuremath{\delta}-doping GaAs superlattices. The off-resonant spectra, to which the deformation potential contributes, reveal the coupling of the LO phonons with the superlattice plasmon; however, those measured close to the ${\mathit{E}}_{0}$+${\mathrm{\ensuremath{\Delta}}}_{0}$ resonance of GaAs present both the Fano-like coupling of the LO phonons with the quasicontinuum single-particle electron excitations and the coupling of the LO phonons with macroscopic depolarization fields of the intersubband electron excitations. It was shown that the Fr\"ohlich interaction is responsible for the Fano-type electron--LO-phonon coupling. Due to the self-consistent origin of the electron-energy spectrum in \ensuremath{\delta}-doping superlattices, the resonance of the Fano interference was found to be strongly dependent on the electron density as well as on the excitation energy. \textcopyright{} 1996 The American Physical Society.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
