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Continuous stimulated emission at T=293 K from separate-confinement heterostructure diode lasers with one layer of InAs quantum dots grown on vicinal GaAs(001) surfaces misoriented in the [010] direction in the active region

  • V. P. Evtikhiev
  • , I. V. Kudryashov
  • , E. Yu Kotel'nikov
  • , V. E. Tokranov
  • , A. N. Titkov
  • , I. S. Tarasov
  • , Zh I. Alferov

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The electroluminescence and stimulated emission of lasers with one layer of InAs quantum dots (QD's) grown in a single molecular-beam epitaxial process on vicinal GaAs(001) surfaces misoriented in the direction [010] by 2, 4 and 6° are investigated. It is discovered that an increase in the misorientation angle leads to a blue shift and a decrease in the full width at half maximum (FWHM) of the electroluminescence spectrum. This effect is attributed to a decrease in the size of the quantum dots and improvement in their size uniformity. A strong dependence of the threshold current density on the width of the spontaneous luminescence spectrum is discovered. The room-temperature threshold current density of the lasers with one layer of quantum dots and the spontaneous luminescence spectrum having the smallest FWHM (54 meV) equals 210 A/cm2.

Original languageEnglish
Pages (from-to)1323-1327
Number of pages5
JournalSemiconductors
Volume32
Issue number12
DOIs
StatePublished - Dec 1998

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