Self-consistent gain calculations and carrier transport analysis for split-well direct-phonon terahertz quantum cascade lasers
A split-well direct phonon THz quantum cascade laser scheme supporting a clean three-level system was analyzed using nonequilibrium Green’s functions. In this system, most of the electrons occupy the lower three levels, and thermally activated leakage channels are suppressed almost entirely. The sim...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2020-11-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0015952 |
| _version_ | 1818725355740987392 |
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| author | Nathalie Lander Gower Silvia Piperno Asaf Albo |
| author_facet | Nathalie Lander Gower Silvia Piperno Asaf Albo |
| author_sort | Nathalie Lander Gower |
| collection | DOAJ |
| description | A split-well direct phonon THz quantum cascade laser scheme supporting a clean three-level system was analyzed using nonequilibrium Green’s functions. In this system, most of the electrons occupy the lower three levels, and thermally activated leakage channels are suppressed almost entirely. The simulations showed that the gain values were deeply affected by the changes in the devices’ interface roughness and impurity scattering strengths. We concluded that in addition to the low oscillator strength and relatively low doping level, these are the mechanisms responsible for the temperature performance limitations of this scheme. |
| first_indexed | 2024-12-17T21:41:00Z |
| format | Article |
| id | doaj.art-c82f7c0970924856b7e7ac5ef54bcd28 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-17T21:41:00Z |
| publishDate | 2020-11-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-c82f7c0970924856b7e7ac5ef54bcd282022-12-21T21:31:38ZengAIP Publishing LLCAIP Advances2158-32262020-11-011011115319115319-610.1063/5.0015952Self-consistent gain calculations and carrier transport analysis for split-well direct-phonon terahertz quantum cascade lasersNathalie Lander Gower0Silvia Piperno1Asaf Albo2Faculty of Engineering, Bar-Ilan University, Ramat Gan 5290002, IsraelFaculty of Engineering, Bar-Ilan University, Ramat Gan 5290002, IsraelFaculty of Engineering, Bar-Ilan University, Ramat Gan 5290002, IsraelA split-well direct phonon THz quantum cascade laser scheme supporting a clean three-level system was analyzed using nonequilibrium Green’s functions. In this system, most of the electrons occupy the lower three levels, and thermally activated leakage channels are suppressed almost entirely. The simulations showed that the gain values were deeply affected by the changes in the devices’ interface roughness and impurity scattering strengths. We concluded that in addition to the low oscillator strength and relatively low doping level, these are the mechanisms responsible for the temperature performance limitations of this scheme.http://dx.doi.org/10.1063/5.0015952 |
| spellingShingle | Nathalie Lander Gower Silvia Piperno Asaf Albo Self-consistent gain calculations and carrier transport analysis for split-well direct-phonon terahertz quantum cascade lasers AIP Advances |
| title | Self-consistent gain calculations and carrier transport analysis for split-well direct-phonon terahertz quantum cascade lasers |
| title_full | Self-consistent gain calculations and carrier transport analysis for split-well direct-phonon terahertz quantum cascade lasers |
| title_fullStr | Self-consistent gain calculations and carrier transport analysis for split-well direct-phonon terahertz quantum cascade lasers |
| title_full_unstemmed | Self-consistent gain calculations and carrier transport analysis for split-well direct-phonon terahertz quantum cascade lasers |
| title_short | Self-consistent gain calculations and carrier transport analysis for split-well direct-phonon terahertz quantum cascade lasers |
| title_sort | self consistent gain calculations and carrier transport analysis for split well direct phonon terahertz quantum cascade lasers |
| url | http://dx.doi.org/10.1063/5.0015952 |
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