Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces

Alexander Milekhin, Nikolay Yeryukov, Alexander Toropov, Dmitry Dmitriev, Evgeniya Sheremet, Dietrich R.T. Zahn

Результат исследований: Материалы для журналаСтатьярецензирование

7 Цитирования (Scopus)

Аннотация

We present a comparative analysis of Raman scattering by acoustic and optical phonons in InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces. Doublets of folded longitudinal acoustic phonons up to the fifth order were observed in the Raman spectra of (001)- and (311)B-oriented quantum dot superlattices measured in the polarized scattering geometries. The energy positions of the folded acoustic phonons are well described by the elastic continuum model. Besides the acoustic phonons, the spectra display features related to confined transverse and longitudinal optical as well as interface phonons in quantum dots and spacer layers. Their frequency positions are discussed in terms of phonon confinement, elastic stress, and atomic intermixing.

Язык оригиналаАнглийский
Номер статьи476
ЖурналNanoscale Research Letters
Том7
DOI
СостояниеОпубликовано - 17 сен 2012
Опубликовано для внешнего пользованияДа

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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