Hot electron bolometer heterodyne receiver with a 4.7-THz quantum cascade laser as a local oscillator
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Hu_Hot electron.pdf
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Author(s)
Kloosterman, J. L.
Hayton, D. J.
Ren, Y.
Hovenier, J. N.
Gao, J. R.
Klapwijk, T. M.
Walker, C. K.
Reno, J. L.
Kao, Tsung-Yu
Hu, Qing
Date Issued
January 2013
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Kloosterman, J. L., D. J. Hayton, Y. Ren, T. Y. Kao, J. N. Hovenier, J. R. Gao, T. M. Klapwijk, Q. Hu, C. K. Walker, and J. L. Reno. “Hot Electron Bolometer Heterodyne Receiver with a 4.7-THz Quantum Cascade Laser as a Local Oscillator.” Appl. Phys. Lett. 102, no. 1 (2013): 011123. © 2013 American Institute of Physics
Version
Final published version
Abstract
We report on a heterodyne receiver designed to observe the astrophysically important neutral atomic oxygen [OI] line at 4.7448 THz. The local oscillator is a third-order distributed feedback quantum cascade laser operating in continuous wave mode at 4.741 THz. A quasi-optical, superconducting NbN hot electron bolometer is used as the mixer. We recorded a double sideband receiver noise temperature ( T[DSB over rec] ) of 815 K, which is ~ 7 times the quantum noise limit ( [hν over 2kB] ) and an Allan variance time of 15 s at an effective noise fluctuation bandwidth of 18 MHz. Heterodyne performance was confirmed by measuring a methanol line spectrum.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
https://doi.org/10.1063/1.4774085
