Optical spectra of ultrathin II-VI quantum wells

Fang Yang, B. Henderson, K.P. O'Donnell

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Ultrathin wide band gap II-VI quantum wells (QW's) feature a large inhomogeneous broadening of exciton transitions in the optical absorption and photoluminescence (PL) spectra. When the photon energy of the excitation laser approaches, or lies within the broadened PL band, a series of additional sharp peaks appear at low energy. The laser induced linear polarisation of the sharp peaks enables the clear demonstration of evenly spaced phonon-assisted transitions. The relative intensity of the phonon-assisted transitions and the mean phonon energy depend strongly on the photon energy of the exciting light. A new model of phonon-assisted relaxation between classically localized states explains these results well.

LanguageEnglish
Pages687-691
Number of pages5
JournalSolid State Communications
Volume88
Issue number9
DOIs
Publication statusPublished - 1 Dec 1993

Fingerprint

Semiconductor quantum wells
optical spectrum
Photoluminescence
Photons
quantum wells
Laser excitation
Electron transitions
Excitons
Light absorption
Energy gap
Demonstrations
Polarization
photoluminescence
energy
Lasers
photons
linear polarization
lasers
optical absorption
excitons

Keywords

  • quantum wells
  • photoluminescence
  • optical absorption

Cite this

Yang, Fang ; Henderson, B. ; O'Donnell, K.P. / Optical spectra of ultrathin II-VI quantum wells. In: Solid State Communications. 1993 ; Vol. 88, No. 9. pp. 687-691.
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Optical spectra of ultrathin II-VI quantum wells. / Yang, Fang; Henderson, B.; O'Donnell, K.P.

In: Solid State Communications, Vol. 88, No. 9, 01.12.1993, p. 687-691.

Research output: Contribution to journalArticle

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