期刊
APPLIED PHYSICS LETTERS
卷 99, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3645635
关键词
bolometers; quantum cascade lasers; terahertz spectroscopy
资金
- European Commission through Investitionsbank Berlin
- Helmholtz Research School on Security Technologies
We report on a terahertz absorption spectrometer, which combines a grating monochromator, a quantum-cascade laser (QCL), and a microbolometer camera. The emission modes of the laser are spectrally resolved by the monochromator and imaged onto the camera. An absorption cell is placed between the QCL and the monochromator, and the absorption spectrum of methanol around 3.4 THz is measured by integrating simultaneously the signal of each of its Fabry-Perot modes as a function of the laser driving current. The frequency coverage of the spectrometer is about 20 GHz. (C) 2011 American Institute of Physics. [doi:10.1063/1.3645635]
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