A 3.5-THz, x6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers
Journal article, 2021

Efficient and compact frequency converters are essential for frequency stabilization of terahertz sources. In this paper, we present a 3.5-THz, 6-harmonic, integrated Schottky diode mixer operating at room temperature. The designed frequency converter is based on a single-ended, planar Schottky diode with a sub-micron anode contact area defined on a suspended 2-m ultra-thin GaAs substrate. The dc-grounded anode pad with the radio frequency E-plane probe resulted in an electrically compact circuit. At 200 MHz intermediate frequency, a mixer conversion loss of about 59 dB is measured resulting in a 40 dB signal-to-noise ratio for phase locking a 3.5-THz quantum-cascade laser. Using a quasi-static diode model combined with electromagnetic simulations, good agreement with the measured results was obtained. Harmonic frequency converters without the need of cryogenic cooling will help in the realization of highly sensitive space and air-borne heterodyne receivers.

harmonic mixers

quantum-cascade lasers

Frequency converters

mixer characterization

frequency stabilization

integrated circuits

heterodyne receivers

Schottky diodes

phase locking

terahertz electronics

Author

Divya Jayasankar

Omnisys Instruments

RISE Research Institutes of Sweden

GigaHertz Centre

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Vladimir Drakinskiy

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

GigaHertz Centre

Omnisys Instruments

RISE Research Institutes of Sweden

Nick Rothbart

Humboldt University of Berlin

German Aerospace Center (DLR)

Heiko Richter

German Aerospace Center (DLR)

Humboldt University of Berlin

Xiang Lü

Paul Drude Institut fur Festkorperelektronik

Lutz Schrottke

Paul Drude Institut fur Festkorperelektronik

Holger T. Grahn

Paul Drude Institut fur Festkorperelektronik

Martin Wienold

German Aerospace Center (DLR)

Humboldt University of Berlin

Heinz-Wilhelm Hübers

German Aerospace Center (DLR)

Humboldt University of Berlin

Peter Sobis

RISE Research Institutes of Sweden

Omnisys Instruments

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

GigaHertz Centre

Jan Stake

Omnisys Instruments

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

GigaHertz Centre

RISE Research Institutes of Sweden

IEEE Transactions on Terahertz Science and Technology

2156-342X (ISSN)

Vol. 11 6 684-694

THz Schottky diode mixers for high resolution FIR spectroscopy

Swedish National Space Board (170/17), 2018-01-01 -- 2019-12-31.

Swedish National Space Board, 2018-01-01 -- 2019-12-31.

Areas of Advance

Information and Communication Technology

Infrastructure

Kollberg Laboratory

Nanofabrication Laboratory

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/TTHZ.2021.3115730

More information

Latest update

11/17/2021