Print Email Facebook Twitter Terahertz heterodyne spectrometer using a quantum cascade laser Title Terahertz heterodyne spectrometer using a quantum cascade laser Author Ren, Y. Hovenier, J.N. Higgins, R. Gao, J.R. Klapwijk, T.M. Shi, S.C. Bell, A. Klein, B. Williams, B.S. Kumar, S. Hu, Q. Reno, J.L. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2010-10-19 Abstract A terahertz (THz) heterodyne spectrometer is demonstrated based on a quantum cascade laser (QCL) as a local oscillator (LO) and an NbN hot electron bolometer as a mixer, and it is used to measure high-resolution molecular spectral lines of methanol (CH3OH) between 2.913–2.918 THz. The spectral lines are taken from a gas cell containing methanol gas and using a single-mode QCL at 2.9156 THz as an LO, which is operated in the free running mode. By increasing the pressure of the gas, line broadening and saturation are observed. The measured spectra showed good agreement with a theoretical model. Subject bolometershot carriersorganic compoundsquantum cascade lasersspectral line broadeningterahertz spectroscopyterahertz wave spectra To reference this document use: http://resolver.tudelft.nl/uuid:9fa99143-7836-409e-bd6b-81909b7d6a0f DOI https://doi.org/10.1063/1.3502479 Publisher American Institute of Physics ISSN 0003-6951 Source http://apl.aip.org/resource/1/applab/v97/i16/p161105_s1 Source Applied Physics Letters, 97 (16), 2010 Part of collection Institutional Repository Document type journal article Rights (c) 2010 The Author(s)American Institute of Physics Files PDF Ren_2010.pdf 368.64 KB Close viewer /islandora/object/uuid:9fa99143-7836-409e-bd6b-81909b7d6a0f/datastream/OBJ/view