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Frequency tuning of terahertz quantum-cascade lasers by spatially controlled optical excitation

Alam, Tasmim and Wienold, Martin and Lü, Xiang and Biermann, Klaus and Schrottke, Lutz and Grahn, Holger T. and Hübers, Heinz-Wilhelm (2019) Frequency tuning of terahertz quantum-cascade lasers by spatially controlled optical excitation. French-German THz Conference 2019, 02-05 April, 2019, Kaiserslautern, Germany.

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Abstract

We demonstrate the feasibility of wideband frequency tuning of terahertz quantum-cascade lasers by spatially well-controlled near-infrared optical excitation. We observe a single-mode continuous-wave frequency coverage of up to 40 GHz for a 3.1 THz laser. This represents a tenfold improvement of the tuning range for the same device as compared to tuning by current. This method is applicable to a wide variety of existing terahertz quantum-cascade lasers.

Item URL in elib:https://elib.dlr.de/127219/
Document Type:Conference or Workshop Item (Speech)
Title:Frequency tuning of terahertz quantum-cascade lasers by spatially controlled optical excitation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Alam, Tasmimtasmim.alam (at) dlr.deUNSPECIFIED
Wienold, MartinMartin.Wienold (at) dlr.deUNSPECIFIED
Lü, Xianglue (at) pdi-berlin.deUNSPECIFIED
Biermann, Klausbiermann (at) pdi-berlin.deUNSPECIFIED
Schrottke, Lutzlutz (at) pdi-berlin.deUNSPECIFIED
Grahn, Holger T.htgrahn (at) pdi-berlin.deUNSPECIFIED
Hübers, Heinz-WilhelmHeinz-Wilhelm.Huebers (at) dlr.deUNSPECIFIED
Date:2019
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:THZ QCL, Frequency Tuning, Molecular Spectroscopy
Event Title:French-German THz Conference 2019
Event Location:Kaiserslautern, Germany
Event Type:international Conference
Event Dates:02-05 April, 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Alam, Tasmim
Deposited On:29 Apr 2019 11:57
Last Modified:31 Jul 2019 20:25

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