Terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer

Journal article (2005)

Authors

J.R. Gao

J.N. Hovenier

S. Kumar

Q. Hu

J.L. Reno

Z.Q. Yang

J.J.A. Baselmans

A. Baryshev

M. Hajenius

T.M. Klapwijk

A.J.L. Adam

T.O. Klaassen

B.S. Williams

Department

Kavli Institute of Nanoscience () (TU Delft)

DOI: https://doi.org/doi:10.1063/1.1949724

Bolometers Quantum cascade lasers Hot carriers Niobium compounds Superconducting mixers Heterodyne detection Submillimetre wave receivers Submillimetre wave mixers Submillimetre wave oscillators

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Published Date

08-06-2005

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Source:

Applied Physics Letters, 86 (24), 2005

Faculty

Applied Sciences

Department

Kavli Institute of Nanoscience

Abstract

We report the first demonstration of an all solid-state heterodyne receiver that can be used for high-resolution spectroscopy above 2?THz suitable for space-based observatories. The receiver uses a NbN superconducting hot-electron bolometer as mixer and a quantum cascade laser operating at 2.8?THz as local oscillator. We measure a double sideband receiver noise temperature of 1400?K at 2.8?THz and 4.2?K, and find that the free-running QCL has sufficient power stability for a practical receiver, demonstrating an unprecedented combination of sensitivity and stability.

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