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A 3.5-THz, 6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers

Jayasankar, Divya and Drakinskiy, Vladimir and Rothbart, Nick and Richter, Heiko and Lü, Xiang and Schrottke, Lutz and Grahn, Holger T. and Wienold, Martin and Hübers, Heinz-Wilhelm and Sobis, Peter and Stake, Jan (2021) A 3.5-THz, 6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers. IEEE Transactions on Terahertz Science and Technology, 11 (6), pp. 684-694. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TTHZ.2021.3115730. ISSN 2156-342X.

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Official URL: https://ieeexplore.ieee.org/document/9548824


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.

Item URL in elib:https://elib.dlr.de/145293/
Document Type:Article
Title:A 3.5-THz, 6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Jayasankar, DivyaChalmers University of Technology, SwedenUNSPECIFIEDUNSPECIFIED
Drakinskiy, VladimirChalmers University of Technology, SwedenUNSPECIFIEDUNSPECIFIED
Lü, XiangPaul-Drude-Institut für Festkörperelektronik, Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Schrottke, LutzPaul-Drude-Institut für Festkörperelektronik, BerlinUNSPECIFIEDUNSPECIFIED
Grahn, Holger T.Paul-Drude-Institut für Festkörperelektronik, BerlinUNSPECIFIEDUNSPECIFIED
Sobis, PeterOmnisys Instruments ABUNSPECIFIEDUNSPECIFIED
Stake, JanChalmers University of TechnologyUNSPECIFIEDUNSPECIFIED
Date:27 September 2021
Journal or Publication Title:IEEE Transactions on Terahertz Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 684-694
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Frequency converters, frequency stabilization, harmonic mixers, heterodyne receivers, integrated circuits, mixer characterization, phase locking, quantum-cascade lasers, Schottky diodes, terahertz electronics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Terahertz spectrometer for atomic oxygen in the mesosphere/thermosphere
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Rothbart, Nick
Deposited On:11 Nov 2021 10:06
Last Modified:11 Nov 2021 10:06

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