Quantum-cascade lasers for terahertz high-resolution spectroscopy

被引：0
|
作者：
Lue, X. [1 ]
Roeben, B. [1 ,2 ]
Biermann, K. [1 ]
Schrottke, L. [1 ]
Wubs, J. R. [3 ]
Macherius, U. [3 ]
Weltmann, K. -D. [3 ]
van Helden, J. H. [3 ]
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] Phys Tech Bundesanstalt PTB, Inst Berlin, Abbestr 2-12, D-10587 Berlin, Germany
[3] Leibniz Inst Plasma Sci & Technol INP, Felix Haussdorff Str 2, D-17489 Greifswald, Germany
来源：
2023 48TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES, IRMMW-THZ | 2023年
关键词：
D O I：
10.1109/IRMMW-THz57677.2023.10299335
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 have developed terahertz (THz) quantum-cascade lasers (QCLs) based on GaAs/AlAs heterostructures for the application-defined emission frequencies of 3.36, 3.92, and 4.75 THz, which correspond to fine-structure transitions of Al atoms, N+ ions, and O atoms, respectively. These THz QCLs can be operated in a mechanical cryocooler in continuous-wave mode, while a sufficient intrinsic tuning range of more than 5 GHz is maintained. This allows them to be implemented as local oscillators in airborne astronomical instruments and as radiation sources for high-resolution absorption spectroscopy to determine absolute densities of atoms and ions in plasmas.
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页数：2
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