Temperature-dependent coherent carrier transport in quantum cascade lasers

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dc.contributor.authorTalukder, Muhammad Anisuzzaman
dc.contributor.authorMenyuk, Curtis
dc.date.accessioned2018-10-19T13:43:31Z
dc.date.available2018-10-19T13:43:31Z
dc.date.issued2011-08-24
dc.description.abstractThe temperature dependence of coherent carrier transport in quantum cascade lasers (QCLs) is studied in this paper. It was found that coherent carrier transport in QCLs decreases as the temperature increases because the coherence between the injector and active region energy levels decays at a faster rate with increasing temperature. Calculations show that the coherence time decreases by at least a factor of two as the temperature increases from 100 K to room temperature. Electron transport from the injector regions into the active regions and vice versa is a highly coherent process that becomes less efficient with decreasing coherence time and hence becomes less efficient with increasing temperature. As a consequence, when the temperature increases, the population of the upper lasing levels in active regions decreases, the population of the lower lasing levels increases and performance suffers.en_US
dc.description.sponsorshipWe gratefully acknowledge support from the MIRTHE Engineering Research Foundation, which is sponsored by the National Science Foundation. We thank Professors F-S Choa, C Gmachl, A Johnson and J Khurgin for useful comments.en_US
dc.description.urihttp://iopscience.iop.org/article/10.1088/1367-2630/13/8/083027/metaen_US
dc.format.extent13 pagesen_US
dc.genrejournal articleen_US
dc.identifierdoi:10.13016/M25H7BX9M
dc.identifier.citationMuhammad Anisuzzaman Talukder, Curtis R Menyuk, Temperature-dependent coherent carrier transport in quantum cascade lasers, New Journal of Physics, Volume 13, August 2011, doi: 10.1088/1367-2630/13/8/083027en_US
dc.identifier.uri10.1088/1367-2630/13/8/083027
dc.identifier.urihttp://hdl.handle.net/11603/11612
dc.language.isoen_USen_US
dc.publisherIOP Publishing and Deutsche Physikalische Gesellschaften_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Computer Science and Electrical Engineering Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsAttribution 3.0 Unported (CC BY 3.0)*
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/deed.en_GB*
dc.subjectquantum cascade lasersen_US
dc.subjectTemperature-dependenten_US
dc.subjectcoherent carrieren_US
dc.subjectcarrier injectionen_US
dc.subjectelectron–LO-phonon scatteringen_US
dc.subjectelectron–interfaceen_US
dc.subjectelectron–electron scatteringen_US
dc.subjectcoherence timesen_US
dc.subjectUMBC High Performance Computing Facility (HPCF)en_US
dc.titleTemperature-dependent coherent carrier transport in quantum cascade lasersen_US
dc.typeTexten_US

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