Terahertz GaAs/AlAs quantum-cascade lasers

Autores
Schrottke, Lutz; Lü, X.; Rozas, Guillermo; Biermann, K.; Grahn, Holger T.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We have realized GaAs/AlAs quantum-cascade lasers operating at 4.75 THz exhibiting more than three times higher wall plug efficiencies than GaAs/Al0.25Ga0.75As lasers with an almost identical design. At the same time, the threshold current density at 10 K is reduced from about 350 A/cm2 for the GaAs/Al0.25Ga0.75As laser to about 120 A/cm2 for the GaAs/AlAs laser. Substituting AlAs for Al0.25Ga0.75As barriers leads to a larger energy separation between the subbands reducing the probability for leakage currents through parasitic states and for reabsorption of the laser light. The higher barriers allow for a shift of the quasi-continuum of states to much higher energies. The use of a binary barrier material may also reduce detrimental effects due to the expected composition fluctuations in ternary alloys.
Fil: Schrottke, Lutz. Paul Drude Institut für Festkörperelektronik; Alemania
Fil: Lü, X.. Paul Drude Institut für Festkörperelektronik; Alemania
Fil: Rozas, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Paul Drude Institut für Festkörperelektronik; Alemania
Fil: Biermann, K.. Paul Drude Institut für Festkörperelektronik; Alemania
Fil: Grahn, Holger T.. Paul Drude Institut für Festkörperelektronik; Alemania
Materia
Quantum Cascade Lasers
Doping
Aluminium
Current Density
Heterojunctions
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/60226
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/60226
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Terahertz GaAs/AlAs quantum-cascade lasersSchrottke, LutzLü, X.Rozas, GuillermoBiermann, K.Grahn, Holger T.Quantum Cascade LasersDopingAluminiumCurrent DensityHeterojunctionshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We have realized GaAs/AlAs quantum-cascade lasers operating at 4.75 THz exhibiting more than three times higher wall plug efficiencies than GaAs/Al0.25Ga0.75As lasers with an almost identical design. At the same time, the threshold current density at 10 K is reduced from about 350 A/cm2 for the GaAs/Al0.25Ga0.75As laser to about 120 A/cm2 for the GaAs/AlAs laser. Substituting AlAs for Al0.25Ga0.75As barriers leads to a larger energy separation between the subbands reducing the probability for leakage currents through parasitic states and for reabsorption of the laser light. The higher barriers allow for a shift of the quasi-continuum of states to much higher energies. The use of a binary barrier material may also reduce detrimental effects due to the expected composition fluctuations in ternary alloys.Fil: Schrottke, Lutz. Paul Drude Institut für Festkörperelektronik; AlemaniaFil: Lü, X.. Paul Drude Institut für Festkörperelektronik; AlemaniaFil: Rozas, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Paul Drude Institut für Festkörperelektronik; AlemaniaFil: Biermann, K.. Paul Drude Institut für Festkörperelektronik; AlemaniaFil: Grahn, Holger T.. Paul Drude Institut für Festkörperelektronik; AlemaniaAmerican Institute of Physics2016-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60226Schrottke, Lutz; Lü, X.; Rozas, Guillermo; Biermann, K.; Grahn, Holger T.; Terahertz GaAs/AlAs quantum-cascade lasers; American Institute of Physics; Applied Physics Letters; 108; 10; 3-2016; 1-50003-6951CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.4943657info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/10.1063/1.4943657info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:09:22Zoai:ri.conicet.gov.ar:11336/60226instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:09:22.574CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Terahertz GaAs/AlAs quantum-cascade lasers
title Terahertz GaAs/AlAs quantum-cascade lasers
spellingShingle Terahertz GaAs/AlAs quantum-cascade lasers
Schrottke, Lutz
Quantum Cascade Lasers
Doping
Aluminium
Current Density
Heterojunctions
title_short Terahertz GaAs/AlAs quantum-cascade lasers
title_full Terahertz GaAs/AlAs quantum-cascade lasers
title_fullStr Terahertz GaAs/AlAs quantum-cascade lasers
title_full_unstemmed Terahertz GaAs/AlAs quantum-cascade lasers
title_sort Terahertz GaAs/AlAs quantum-cascade lasers
dc.creator.none.fl_str_mv Schrottke, Lutz
Lü, X.
Rozas, Guillermo
Biermann, K.
Grahn, Holger T.
author Schrottke, Lutz
author_facet Schrottke, Lutz
Lü, X.
Rozas, Guillermo
Biermann, K.
Grahn, Holger T.
author_role author
author2 Lü, X.
Rozas, Guillermo
Biermann, K.
Grahn, Holger T.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Quantum Cascade Lasers
Doping
Aluminium
Current Density
Heterojunctions
topic Quantum Cascade Lasers
Doping
Aluminium
Current Density
Heterojunctions
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We have realized GaAs/AlAs quantum-cascade lasers operating at 4.75 THz exhibiting more than three times higher wall plug efficiencies than GaAs/Al0.25Ga0.75As lasers with an almost identical design. At the same time, the threshold current density at 10 K is reduced from about 350 A/cm2 for the GaAs/Al0.25Ga0.75As laser to about 120 A/cm2 for the GaAs/AlAs laser. Substituting AlAs for Al0.25Ga0.75As barriers leads to a larger energy separation between the subbands reducing the probability for leakage currents through parasitic states and for reabsorption of the laser light. The higher barriers allow for a shift of the quasi-continuum of states to much higher energies. The use of a binary barrier material may also reduce detrimental effects due to the expected composition fluctuations in ternary alloys.
Fil: Schrottke, Lutz. Paul Drude Institut für Festkörperelektronik; Alemania
Fil: Lü, X.. Paul Drude Institut für Festkörperelektronik; Alemania
Fil: Rozas, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Paul Drude Institut für Festkörperelektronik; Alemania
Fil: Biermann, K.. Paul Drude Institut für Festkörperelektronik; Alemania
Fil: Grahn, Holger T.. Paul Drude Institut für Festkörperelektronik; Alemania
description We have realized GaAs/AlAs quantum-cascade lasers operating at 4.75 THz exhibiting more than three times higher wall plug efficiencies than GaAs/Al0.25Ga0.75As lasers with an almost identical design. At the same time, the threshold current density at 10 K is reduced from about 350 A/cm2 for the GaAs/Al0.25Ga0.75As laser to about 120 A/cm2 for the GaAs/AlAs laser. Substituting AlAs for Al0.25Ga0.75As barriers leads to a larger energy separation between the subbands reducing the probability for leakage currents through parasitic states and for reabsorption of the laser light. The higher barriers allow for a shift of the quasi-continuum of states to much higher energies. The use of a binary barrier material may also reduce detrimental effects due to the expected composition fluctuations in ternary alloys.
publishDate 2016
dc.date.none.fl_str_mv 2016-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/60226
Schrottke, Lutz; Lü, X.; Rozas, Guillermo; Biermann, K.; Grahn, Holger T.; Terahertz GaAs/AlAs quantum-cascade lasers; American Institute of Physics; Applied Physics Letters; 108; 10; 3-2016; 1-5
0003-6951
CONICET Digital
CONICET
url http://hdl.handle.net/11336/60226
identifier_str_mv Schrottke, Lutz; Lü, X.; Rozas, Guillermo; Biermann, K.; Grahn, Holger T.; Terahertz GaAs/AlAs quantum-cascade lasers; American Institute of Physics; Applied Physics Letters; 108; 10; 3-2016; 1-5
0003-6951
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4943657
info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/10.1063/1.4943657
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.993085

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