Exciton-phonon interaction in epitaxial CdSe/ZnSe nanostructures

A. M. Kapitonov, U. Woggon, K. Leonardi, D. Hommel, K. Edamatsu, T. Itoh

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The low-temperature optical properties of submonolayer CdSe/ZnSe nanostructures have been investigated with nominal layer thickness of 0.15 ML and 0.58 ML CdSe. In photoluminescence excitation spectroscopy (PLE) we observe more than 10 equidistant peaks separated by the ZnSe LO-phonon energy even at energies high above the ZnSe-band edge. The peak heights and line shapes are extremely sensitive to the monolayer coverage, have strongly different intensities in emission and PLE and deviate from the Poissonian intensity distribution expected within the concept of a constant, material specific Huang-Rhys parameter S. A bound polaron model is proposed to explain the optical properties of quantum structures for which the approach of a pure electronic quantum confinement is not appropriate. Intrinsic coherence of joint exciton-phonon modes is very promising, e.g. for application in quantum information processing or coherent population transfer.

Original languageEnglish
Pages (from-to)317-320
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume238
Issue number2
DOIs
Publication statusPublished - 2003 Jul
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Exciton-phonon interaction in epitaxial CdSe/ZnSe nanostructures'. Together they form a unique fingerprint.

Cite this