In:
Semiconductor Science and Technology, IOP Publishing, Vol. 38, No. 3 ( 2023-03-01), p. 035003-
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
0268-1242
,
1361-6641
DOI:
10.1088/1361-6641/acb1cd
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2023
detail.hit.zdb_id:
54647-1
detail.hit.zdb_id:
1361285-2
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