Chen, W;
Deng, Z;
Guo, D;
Chen, Y;
Mazur, Y;
Maidaniuk, Y;
Benamara, M;
... Chen, B; + view all
(2018)
Demonstration of InAs/InGaAs/GaAs Quantum Dots-in-a-Well Mid-Wave Infrared Photodetectors Grown on Silicon Substrate.
Journal of Lightwave Technology
, 36
(13)
pp. 2572-2581.
10.1109/JLT.2018.2811388.
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Abstract
In this paper, we have demonstrated the first InAs/InGaAs/GaAs quantum dots-in-a-well (DWELL) photodetector monolithically grown on silicon substrate. We studied both the optical and electrical characteristics of the DWELL photodetectors. Time-resolved photoluminescence spectra measured from the DWELL photodetector revealed a long carrier lifetime of 1.52 ns. A low dark current density of 2.03 × 10 -3 mA/cm 2 was achieved under 1 V bias at 77 K. The device showed a peak responsivity of 10.9 mA/W under 2 V bias at the wavelength of 6.4 μm at 77 K, and the corresponding detectivity was 5.78 × 10 8 cm·Hz 1/2 /W. These results demonstrated that these silicon-based DWELL photodetectors are very promising for future mid-infrared applications, which can enjoy the potential benefit from mid-infrared silicon photonics technology.
| Type: | Article |
|---|---|
| Title: | Demonstration of InAs/InGaAs/GaAs Quantum Dots-in-a-Well Mid-Wave Infrared Photodetectors Grown on Silicon Substrate |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JLT.2018.2811388 |
| Publisher version: | http://dx.doi.org/10.1109/JLT.2018.2811388 |
| 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: | Science & Technology, Technology, Physical Sciences, Engineering, Electrical & Electronic, Optics, Telecommunications, Engineering, Infrared photodetector, quantum dots-in-a-well, silicon substrate, DETECTORS, LAYERS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science 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/10058952 |
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