| DOI | Resolve DOI: https://doi.org/10.1109/JQE.2020.3003081 |
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| Author | Search for: Lin, YuzheORCID identifier: https://orcid.org/0000-0002-2315-0066; Search for: Li, Lu; Search for: Huang, Wenxiang; Search for: Yang, Rui Q.ORCID identifier: https://orcid.org/0000-0002-4504-4897; Search for: Gupta, James A.1; Search for: Zheng, Wanhua |
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| Affiliation | - National Research Council of Canada. Advanced Electronics and Photonics
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| Funder | Search for: National Science Foundation |
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| Format | Text, Article |
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| Subject | interband cascade laser; quasi-Fermi level pinning; semiconductor heterostructure; quantum well; temperature measurement; quantum cascade lasers; resistance; threshold current; temperature distribution |
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| Abstract | A systematic study of the quasi-Fermi level pinning in various interband cascade lasers (ICLs) is reported. These ICLs, with either type-II or type-I quantum well active regions, cover the mid-infrared wavelength range from 3 to 6 µm and can operate in continuous wave (cw) at room temperatures and above. It was found that the quasi-Fermi level can be pinned in many ICLs over a wide range of temperature, which is associated with an observed drop of differential resistance at threshold. For the first time, the quasi-Fermi level pinning was demonstrated in ICLs at room temperature. The temperature dependence of the quasi-Fermi level pinning in ICLs was also examined. A pinning factor is introduced to evaluate how well the quasi-Fermi level is pinned in ICLs with different configurations and lasing wavelengths. Also, it was found that the quasi-Fermi level pinning disappeared in some ICLs where an obvious drop of differential resistance could not be observed at the threshold. Furthermore, the quasi-Fermi level pinning was found to be correlated to the doping concentration in electron injectors in ICLs. Possible mechanisms and implications related to the quasiFermi level pinning are discussed. |
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| Publication date | 2020-06-17 |
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| Publisher | IEEE |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | dd7ad354-23ea-4950-9ee8-7813334f5420 |
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| Record created | 2022-06-24 |
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| Record modified | 2022-06-24 |
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