Jia, Hui;
Park, Jae-Seong;
Li, Jun;
Liu, Kongming;
Yuan, Jiajing;
Dear, Calum;
Zeng, Haotian;
... Liu, Huiyun; + view all
(2025)
InAs/InAlGaAs Quantum Dot Lasers on InP and Si.
IEEE Journal of Selected Topics in Quantum Electronics
10.1109/jstqe.2025.3641548.
(In press).
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Abstract
We report the development of InAs/InAlGaAs quantum-dot (QD) lasers grown on both InP and Si substrates. A modified indium flush technique was employed to control dot-height distribution and tailor the emission wavelength by using a strained partial capping layer. Using this approach, 7-stack InAs/InAlGaAs QD lasers on InP substrates exhibit a low threshold current density (Jth) of 63 A/cm2 per QD layer and high-temperature operation up to 140°C. Furthermore, electrically pumped InAs/InAlGaAs QD lasers directly grown on Si are also demonstrated, with a low Jth of 1.35 kA/cm2 and a maximum operating temperature of 100°C. This work highlights the effectiveness of the modified indium flush in achieving high-performance InAs/InAlGaAs QD lasers. These results represent a significant step forward in the development of high-performance C-/L-band QD lasers in the InAs/InAlGaAs/InP material system for Si photonics.
| Type: | Article |
|---|---|
| Title: | InAs/InAlGaAs Quantum Dot Lasers on InP and Si |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/jstqe.2025.3641548 |
| Publisher version: | https://doi.org/10.1109/jstqe.2025.3641548 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Indium, Silicon, Substrates, Indium phosphide, III-V semiconductor materials, Lasers, Laser excitation, Pump lasers, Photonics, Chemical lasers |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10218995 |
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