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Spectra of mode loss in THz quantum cascade laser with double metal waveguide based on Au, Cu and Ag

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dc.contributor.authorKhabibullin, R.
dc.contributor.authorUshakov, D.
dc.contributor.authorAfonenko, A.
dc.contributor.authorShchavruk, N.
dc.contributor.authorVasil'Evskii, I.
dc.contributor.authorSafonov, D.
dc.contributor.authorВасильевский, Иван Сергеевич
dc.contributor.authorСафонов, Данил Андреевич
dc.date.accessioned2024-11-21T10:07:33Z
dc.date.available2024-11-21T10:07:33Z
dc.date.issued2019
dc.description.abstract© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.The spectra of mode loss in terahertz quantum cascade laser (THz QCL) with double metal waveguide (DMW) based on Au, Cu and Ag have been analysed. On the basis of measurements of the resistivity of DMW claddings for the temperature range from 4.2 to 300 K, the loss coefficients of THz radiation at Au-, Cu-, Ag-claddings are calculated. We show that the Ag-based DMW allows to reduce the losses by 1.3-7.0 cm-1 in comparison with Au-based DMW at room temperature. Our calculations show that the Ag-based DMW has slightly lower losses (∼1 cm-1) than Cu-based DMW at cryogenic temperatures (below 100 K). The use of Cu-based DMW allows to reduce the loss coefficient in comparison with Ag-based DMW at higher temperatures (above 100 K). Temperature dependence of threshold gain for THz QCL with Au-, Cu-, Ag-based DMW are calculated. Taking into account the absorption of THz radiation by free carriers and optical phonons, the spectrum of total mode loss of THz QCL with different thickness of n+-GaAs top contact layer are analyses.
dc.identifier.citationSpectra of mode loss in THz quantum cascade laser with double metal waveguide based on Au, Cu and Ag / Khabibullin, R. [et al.] // Progress in Biomedical Optics and Imaging - Proceedings of SPIE. - 2019. - 11066. - 10.1117/12.2523284
dc.identifier.doi10.1117/12.2523284
dc.identifier.urihttps://www.doi.org/10.1117/12.2523284
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85068485010&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000483491300038
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/18367
dc.relation.ispartofProgress in Biomedical Optics and Imaging - Proceedings of SPIE
dc.titleSpectra of mode loss in THz quantum cascade laser with double metal waveguide based on Au, Cu and Ag
dc.typeConference Paper
dspace.entity.typePublication
oaire.citation.volume11066
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relation.isAuthorOfPublication82e59a49-b32c-4996-a1e5-25f94c444179
relation.isAuthorOfPublication.latestForDiscovery8ce84220-3c34-4278-83e7-c79be7660fe9
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