Terahertz quantum-cascade lasers for high-resolution absorption spectroscopy of atoms and ions in plasmas

被引：7

作者：

Lue, X. ^{[1
]}

Roeben, B. ^{[1
,3
]}

Biermann, K. ^{[1
]}

Wubs, J. R. ^{[2
]}

Macherius, U. ^{[2
]}

Weltmann, K-D ^{[2
]}

van Helden, J. H. ^{[2
]}

Schrottke, L. ^{[1
]}

Grahn, H. T. ^{[1
]}

机构：

[1] Leibniz Inst Forsch Verbund Berlin eV, Paul Drude Inst Festkorperelekt, Hausvogteipl 5-7, D-10117 Berlin, Germany

[2] Leibniz Inst Plasma Sci & Technol INP, Felix Hausdorff Str 2, D-17489 Greifswald, Germany

[3] Inst Berlin, Phys Tech Bundesanstalt, Abbestr 2-12, D-10587 Berlin, Germany

来源：

SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 2023年 / 38卷 / 03期

关键词：

terahertz quantum-cascade lasers; emission frequency; GaAs; AlAs; OXYGEN;

D O I：

10.1088/1361-6641/acb1cd

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report on terahertz (THz) quantum-cascade lasers (QCLs) based on GaAs/AlAs heterostructures, which exhibit single-mode emission at 3.360, 3.921, and 4.745 THz. These frequencies are in close correspondence to fine-structure transitions of Al atoms, N+ ions, and O atoms, respectively. Due to the low electrical pump power of these THz QCLs, they can be operated in a mechanical cryocooler in continuous-wave mode, while a sufficient intrinsic tuning range of more than 5 GHz is maintained. The single-mode operation and the intrinsic tuning range of these THz QCLs allow for the application of these lasers as radiation sources for high-resolution absorption spectroscopy to determine the absolute densities of Al atoms, N+ ions, and O atoms in plasmas.

引用

页数：6

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