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Frequency dependence of the maximum operating temperature for quantum-cascade lasers up to 5.4 THz

Wienold, Martin and Röben, Benjamin and Lü, Xiang and Schrottke, Lutz and Rozas, Guillermo and Biermann, Klaus and Grahn, Holger T. (2015) Frequency dependence of the maximum operating temperature for quantum-cascade lasers up to 5.4 THz. Applied Physics Letters, 107, p. 202101. American Institute of Physics (AIP). DOI: 10.1063/1.4935942 ISSN 0003-6951

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Official URL: http://dx.doi.org/10.1063/1.4935942

Abstract

We report on the observation of an approximately linear reduction in the maximum operating temperature with an increasing emission frequency for terahertz quantum-cascade lasers between 4.2 and 5.4 THz. These lasers are based on the same design type, but vary in period length and barrier height for the cascade structure. The sample emitting at the highest frequency around 5.4 THz can be operated in pulsed mode up to 56 K. We identify an additional relaxation channel for electrons by longitudinal optical phonon scattering from the upper to the lower laser level and increasing optical losses toward higher frequencies as major processes, leading to the observed temperature behavior.

Item URL in elib:https://elib.dlr.de/101335/
Document Type:Article
Title:Frequency dependence of the maximum operating temperature for quantum-cascade lasers up to 5.4 THz
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wienold, MartinDLR, HU, PDIUNSPECIFIED
Röben, BenjaminPDIUNSPECIFIED
Lü, XiangPDIUNSPECIFIED
Schrottke, LutzPDIUNSPECIFIED
Rozas, GuillermoPDIUNSPECIFIED
Biermann, KlausPDIUNSPECIFIED
Grahn, Holger T.PDIUNSPECIFIED
Date:16 November 2015
Journal or Publication Title:Applied Physics Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:107
DOI :10.1063/1.4935942
Page Range:p. 202101
Publisher:American Institute of Physics (AIP)
ISSN:0003-6951
Status:Published
Keywords:Terahertz, Quantenkaskadenlaser
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Optische Technologien und Anwendungen
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems
Deposited By: Wienold, Martin
Deposited On:04 Jan 2016 08:02
Last Modified:08 Mar 2018 18:52

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