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 language | English |
|---|---|
| Pages (from-to) | 1323-1327 |
| Number of pages | 5 |
| Journal | Semiconductors |
| Volume | 32 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 1998 |
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