3.5 THz quantum-cascade laser emission from dual diagonal feedhorns

B. N. Ellison, A. Valavanis, O. Auriacombe, D. Gerber, T. Rawlings, N. Brewster, M. L. Oldfield, Y. Han, L. H. Li, E. Zafar, E. H. Linfield, A. G. Davies, G. Savini, M. Emes, B. Winter, D. Walker, E. Saenz

Research output: Contribution to journalArticle

Abstract

Antenna-pattern measurements obtained from a double-metal supra-terahertz-frequency (supra-THz) quantum cascade laser (QCL) are presented. The QCL is mounted within a mechanically micro-machined waveguide cavity containing dual diagonal feedhorns. Operating in continuous-wave mode at 3.5 THz, and at an ambient temperature of ∼60 K, QCL emission has been directed via the feedhorns to a supra-THz detector mounted on a multi-axis linear scanner. Comparison of simulated and measured far-field antenna patterns shows an excellent degree of correlation between beamwidth (full-width-half-maximum) and sidelobe content and a very substantial improvement when compared with unmounted devices. Additionally, a single output has been used to successfully illuminate and demonstrate an optical breadboard arrangement associated with a future supra-THz Earth observation space-borne payload. Our novel device has therefore provided a valuable demonstration of the effectiveness of supra-THz diagonal feedhorns and QCL devices for future space-borne ultra-high-frequency Earth-observing heterodyne radiometers.

LanguageEnglish
Number of pages9
JournalInternational Journal of Microwave and Wireless Technologies
Early online date8 May 2019
DOIs
Publication statusE-pub ahead of print - 8 May 2019

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Quantum cascade lasers
Directional patterns (antenna)
Earth (planet)
Radiometers
Waveguides
Demonstrations
Detectors
Metals
Temperature

Cite this

Ellison, B. N., Valavanis, A., Auriacombe, O., Gerber, D., Rawlings, T., Brewster, N., ... Saenz, E. (2019). 3.5 THz quantum-cascade laser emission from dual diagonal feedhorns. International Journal of Microwave and Wireless Technologies. https://doi.org/10.1017/S175907871900028X
Ellison, B. N. ; Valavanis, A. ; Auriacombe, O. ; Gerber, D. ; Rawlings, T. ; Brewster, N. ; Oldfield, M. L. ; Han, Y. ; Li, L. H. ; Zafar, E. ; Linfield, E. H. ; Davies, A. G. ; Savini, G. ; Emes, M. ; Winter, B. ; Walker, D. ; Saenz, E. / 3.5 THz quantum-cascade laser emission from dual diagonal feedhorns. In: International Journal of Microwave and Wireless Technologies. 2019.
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abstract = "Antenna-pattern measurements obtained from a double-metal supra-terahertz-frequency (supra-THz) quantum cascade laser (QCL) are presented. The QCL is mounted within a mechanically micro-machined waveguide cavity containing dual diagonal feedhorns. Operating in continuous-wave mode at 3.5 THz, and at an ambient temperature of ∼60 K, QCL emission has been directed via the feedhorns to a supra-THz detector mounted on a multi-axis linear scanner. Comparison of simulated and measured far-field antenna patterns shows an excellent degree of correlation between beamwidth (full-width-half-maximum) and sidelobe content and a very substantial improvement when compared with unmounted devices. Additionally, a single output has been used to successfully illuminate and demonstrate an optical breadboard arrangement associated with a future supra-THz Earth observation space-borne payload. Our novel device has therefore provided a valuable demonstration of the effectiveness of supra-THz diagonal feedhorns and QCL devices for future space-borne ultra-high-frequency Earth-observing heterodyne radiometers.",
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author = "Ellison, {B. N.} and A. Valavanis and O. Auriacombe and D. Gerber and T. Rawlings and N. Brewster and Oldfield, {M. L.} and Y. Han and Li, {L. H.} and E. Zafar and Linfield, {E. H.} and Davies, {A. G.} and G. Savini and M. Emes and B. Winter and D. Walker and E. Saenz",
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Ellison, BN, Valavanis, A, Auriacombe, O, Gerber, D, Rawlings, T, Brewster, N, Oldfield, ML, Han, Y, Li, LH, Zafar, E, Linfield, EH, Davies, AG, Savini, G, Emes, M, Winter, B, Walker, D & Saenz, E 2019, '3.5 THz quantum-cascade laser emission from dual diagonal feedhorns', International Journal of Microwave and Wireless Technologies. https://doi.org/10.1017/S175907871900028X

3.5 THz quantum-cascade laser emission from dual diagonal feedhorns. / Ellison, B. N.; Valavanis, A.; Auriacombe, O.; Gerber, D.; Rawlings, T.; Brewster, N.; Oldfield, M. L.; Han, Y.; Li, L. H.; Zafar, E.; Linfield, E. H.; Davies, A. G.; Savini, G.; Emes, M.; Winter, B.; Walker, D.; Saenz, E.

In: International Journal of Microwave and Wireless Technologies, 08.05.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - 3.5 THz quantum-cascade laser emission from dual diagonal feedhorns

AU - Ellison, B. N.

AU - Valavanis, A.

AU - Auriacombe, O.

AU - Gerber, D.

AU - Rawlings, T.

AU - Brewster, N.

AU - Oldfield, M. L.

AU - Han, Y.

AU - Li, L. H.

AU - Zafar, E.

AU - Linfield, E. H.

AU - Davies, A. G.

AU - Savini, G.

AU - Emes, M.

AU - Winter, B.

AU - Walker, D.

AU - Saenz, E.

PY - 2019/5/8

Y1 - 2019/5/8

N2 - Antenna-pattern measurements obtained from a double-metal supra-terahertz-frequency (supra-THz) quantum cascade laser (QCL) are presented. The QCL is mounted within a mechanically micro-machined waveguide cavity containing dual diagonal feedhorns. Operating in continuous-wave mode at 3.5 THz, and at an ambient temperature of ∼60 K, QCL emission has been directed via the feedhorns to a supra-THz detector mounted on a multi-axis linear scanner. Comparison of simulated and measured far-field antenna patterns shows an excellent degree of correlation between beamwidth (full-width-half-maximum) and sidelobe content and a very substantial improvement when compared with unmounted devices. Additionally, a single output has been used to successfully illuminate and demonstrate an optical breadboard arrangement associated with a future supra-THz Earth observation space-borne payload. Our novel device has therefore provided a valuable demonstration of the effectiveness of supra-THz diagonal feedhorns and QCL devices for future space-borne ultra-high-frequency Earth-observing heterodyne radiometers.

AB - Antenna-pattern measurements obtained from a double-metal supra-terahertz-frequency (supra-THz) quantum cascade laser (QCL) are presented. The QCL is mounted within a mechanically micro-machined waveguide cavity containing dual diagonal feedhorns. Operating in continuous-wave mode at 3.5 THz, and at an ambient temperature of ∼60 K, QCL emission has been directed via the feedhorns to a supra-THz detector mounted on a multi-axis linear scanner. Comparison of simulated and measured far-field antenna patterns shows an excellent degree of correlation between beamwidth (full-width-half-maximum) and sidelobe content and a very substantial improvement when compared with unmounted devices. Additionally, a single output has been used to successfully illuminate and demonstrate an optical breadboard arrangement associated with a future supra-THz Earth observation space-borne payload. Our novel device has therefore provided a valuable demonstration of the effectiveness of supra-THz diagonal feedhorns and QCL devices for future space-borne ultra-high-frequency Earth-observing heterodyne radiometers.

KW - dual diagonal feedhorn

KW - earth observation

KW - heterodyne

KW - quantum-cascade laser

KW - radiometer

KW - Supra-terahertz

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U2 - 10.1017/S175907871900028X

DO - 10.1017/S175907871900028X

M3 - Article

JO - International Journal of Microwave and Wireless Technologies

T2 - International Journal of Microwave and Wireless Technologies

JF - International Journal of Microwave and Wireless Technologies

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