ChemInform Abstract: LEBENSDAUER VON UNGLEICHGEWICHTS‐LADUNGSTRAEGERN IN CD(X)HG(1‐X)TE‐EINKRISTALLEN

Vdovkina, E. E.; Baryshev, N. S.; Volkova, F. P.; Cherkasov, Anatoliy P.; Щетинин, Михаил Павлович; Aver'yanov, I. S.

doi:10.1002/chin.197314017

Cited by 1 publication

(1 citation statement)

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“…The results are compared to the most complete data set for ICLs with T2 "W" active QWs (blue points) [18], which were extracted from the pulsed thresholds for broad area lasers with standard dimensions at 300 K. Also shown in Fig. 4 are the Auger coefficients reported for various bulk III-V (black) [28], [44], II-VI (green) [45]- [49], and IV-VI (magenta) [50], [51] semiconductors with energy gaps in the same mid-IR range. Auger coefficients vs. wavelength (corresponding to the energy gap), as extracted from T1 (red) and T2 [18] (blue) QW laser thresholds at room temperature.…”

Section: "3d" Auger Coefficientsmentioning

confidence: 99%

Comparison of Auger Coefficients in Type I and Type II Quantum Well Midwave Infrared Lasers

Meyer

Canedy

Kim

et al. 2021

IEEE J. Quantum Electron.

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We perform a detailed comparison of 2D Auger coefficients in narrow-gap type-I and type-II quantum wells (T1QWs and T2QWs), and the relative effects of Auger nonradiative decay on midwave infrared lasers employing both types of gain media. Comparison is also made to 3D Auger coefficients in bulk mid-IR materials, by defining a "normalization length" that accounts for the spatial extent of the electron and hole wavefunctions in the quantum wells. The comparisons confirm that Auger recombination in both types of QW is substantially suppressed relative to bulk, due primarily to the effects of compressive strain on the valence band dispersions. We find that the 2D Auger coefficients in T1QWs remain substantially lower than those in T2QWs out to wavelengths beyond 3.5 µm. However, this does not necessarily imply a lower lasing threshold because a substantial fraction of the holes injected into T1QWs occupy lower subbands that do not contribute gain, so more must be injected to reach the lasing threshold. When all of the relevant considerations are combined, the thresholds for the best T1QW and T2QW lasers cross over near λ ≈ 3.0 µm. Other characteristics governing the relative T1QW and T2QW laser performances above threshold, such as maximum output power and wallplug efficiency, are also considered.

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