A semiconductor laser containing seven InAs-InGaAs stacked quantum-dot (QD) layers was grown by molecular beam epitaxy. Shallow mesa ridge-waveguide lasers with stripe width of 120 μm were fabricated and tested. A high modal gain of 41 cm-1was obtained at room temperature corresponding to a modal gain of ∼6 cm-1 per QD layer, which is very promising to enable the realization of 1.3-μm ultrashort cavity devices such as vertical-cavity surface-emitting lasers. Ground state laser action was achieved for a 360-μm-cavity length with as-cleaved facets. The transparency current density per QD layer and internal quantum efficiency were 13 A/cm2 and 67%, respectively.
Titolo: | High-modal gain 1300-nm In(Ga)As-GaAs quantum-dot lasers |
Autori: | |
Data di pubblicazione: | 2006 |
Rivista: | |
Abstract: | A semiconductor laser containing seven InAs-InGaAs stacked quantum-dot (QD) layers was grown by molecular beam epitaxy. Shallow mesa ridge-waveguide lasers with stripe width of 120 μm were fabricated and tested. A high modal gain of 41 cm-1was obtained at room temperature corresponding to a modal gain of ∼6 cm-1 per QD layer, which is very promising to enable the realization of 1.3-μm ultrashort cavity devices such as vertical-cavity surface-emitting lasers. Ground state laser action was achieved for a 360-μm-cavity length with as-cleaved facets. The transparency current density per QD layer and internal quantum efficiency were 13 A/cm2 and 67%, respectively. |
Handle: | http://hdl.handle.net/11587/107301 |
Appare nelle tipologie: | Articolo pubblicato su Rivista |