Karomi, Ivan, Smowton, Peter Michael  ORCID: https://orcid.org/0000-0002-9105-4842, Shutts, Samuel ORCID: https://orcid.org/0000-0001-6751-7790, Krysa, Andrey B. and Beanland, Richard
2015.
InAsP quantum dot lasers grown by MOVPE.
Optics Express
23
(21)
, pp. 27282-27291.
10.1364/OE.23.027282
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Abstract
We report on InAsP quantum dot lasers grown by MOVPE for 730-780 nm wavelength emission and compare performance with InP dot samples grown under similar conditions and with similar structures. 1-4 mm long, uncoated facet InAsP dot lasers emit between 760 and 775 nm and 2 mm long lasers with uncoated facets have threshold current density of 260 Acm−2, compared with 150 Acm−2 for InP quantum dot samples, which emit at shorter wavelengths, 715-725 nm. Pulsed lasing is demonstrated for InAsP dots up to 380 K with up to 200 mW output power. Measured absorption spectra indicate the addition of Arsenic to the dots has shifted the available transitions to longer wavelengths but also results in a much larger degree of spectral broadening. These spectra and transmission electron microscopy images indicate that the InAsP dots have a much larger degree of inhomogeneous broadening due to dot size variation, both from layer to layer and within a layer.
| Item Type: | Article |
|---|---|
| Date Type: | Published Online |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QC Physics |
| Publisher: | Optical Society of America |
| ISSN: | 1094-4087 |
| Funders: | EPSRC |
| Date of First Compliant Deposit: | 30 March 2016 |
| Date of Acceptance: | 17 September 2015 |
| Last Modified: | 07 May 2023 19:30 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/84472 |
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