Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2988896
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Funding
- European Commission
- EPSRC [EP/D025532/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D025532/1] Funding Source: researchfish
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A liquid cryogen-free terahertz heterodyne receiver in a pulse tube cooler has been realized. The receiver operates at 2.5 THz. It is based on a quantum cascade laser (QCL) as local oscillator and a hot electron bolometric mixer. A detailed study of the QCL beam quality yielded a beam propagation factor of 1.1-1.2. The double sideband noise temperature of the system is 2000 K and when corrected for optical losses in the signal path it is similar to 800 K. (C) 2008 American Institute of Physics.
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