We report a study of multiphonon resonant Raman scattering in a series of symmetric (ZnSe)d(ZnS1-xSex)d superlattices (SL), 20Å ≤ d ≤ 150Å. In addition to confined optical phonons, the energies of interface (IF) modes with in-plane wavevectors have been assessed by means of micro-probe Raman measurements in backscattering from the SL edge. The comparison between one- and two-phonon spectra shows that the electron-phonon interaction is dominated by ZnSe-like IF phonons for d < 50Å, whereas LO2 phonons prevail for larger well.
Well width dependence of electron-phonon interaction in ZnSe/ZnSxSe1-x superlattices determined by Micro-Raman spectroscopy / Spagnolo, V.; Scamarcio, G.; Corvasce, C.; Lugará, M.; Suemune, I.. - In: SUPERLATTICES AND MICROSTRUCTURES. - ISSN 0749-6036. - STAMPA. - 16:1(1994), pp. 47-49. [10.1006/spmi.1994.1107]
Well width dependence of electron-phonon interaction in ZnSe/ZnSxSe1-x superlattices determined by Micro-Raman spectroscopy
Spagnolo, V.;
1994-01-01
Abstract
We report a study of multiphonon resonant Raman scattering in a series of symmetric (ZnSe)d(ZnS1-xSex)d superlattices (SL), 20Å ≤ d ≤ 150Å. In addition to confined optical phonons, the energies of interface (IF) modes with in-plane wavevectors have been assessed by means of micro-probe Raman measurements in backscattering from the SL edge. The comparison between one- and two-phonon spectra shows that the electron-phonon interaction is dominated by ZnSe-like IF phonons for d < 50Å, whereas LO2 phonons prevail for larger well.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
