Abstract
We have studied the effect of doping on the temperature performance of a split-well (SW) direct-phonon (DP) terahertz (THz) quantum-cascade laser (QCL) scheme supporting a clean three-level system. We expected to obtain a similar improvement in the temperature performance to that observed in resonant-phonon (RP) schemes after increasing the carrier concentration from 3 × 1010cm-2 to 6 × 1010, cm-2 To our surprise, in the devices we checked, the results show the contrary. However, we observed a significant increase in gain broadening and a reduction in the dephasing time as the doping and temperature increased. We attribute these effects to enhanced ionized-impurity scattering (IIS). The observation and study of effects related to dephasing included in our experimental work have previously only been possible via simulation.
Original language | English |
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Title of host publication | IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves |
Publisher | IEEE Computer Society |
ISBN (Electronic) | 9781728194271 |
DOIs | |
State | Published - 2022 |
Event | 47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022 - Delft, Netherlands Duration: 28 Aug 2022 → 2 Sep 2022 |
Publication series
Name | International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz |
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Volume | 2022-August |
ISSN (Print) | 2162-2027 |
ISSN (Electronic) | 2162-2035 |
Conference
Conference | 47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022 |
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Country/Territory | Netherlands |
City | Delft |
Period | 28/08/22 → 2/09/22 |
Bibliographical note
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