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Silver-based double metal waveguide for terahertz quantum cascade laser

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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.accessioned2024-11-20T10:39:05Z
dc.date.available2024-11-20T10:39:05Z
dc.date.issued2019
dc.description.abstract© 2019 SPIE. We have designed and fabricated terahertz quantum cascade lasers (THz QCLs) with double metal waveguide (DMW) based on three and four-quantum well GaAs/Al 0.15 Ga 0.85 As active module with resonant-phonon depopulation scheme. Three-well and four-well THz QCLs have a lasing frequencies of 3.2 THz and 2.3 THz, respectively. We investigate the dependence of threshold current and lasing output power on temperature for fabricated THz QCL. We propose to use DMW based on silver (Ag) for reducing the losses of the waveguide. The spectra of the loss coefficient of the DMW based on Au and Ag are calculated. It is shown, that the use of Ag-based DMW allows to reduce losses by 2-4 cm -1 in comparison with Au-based DMW. Taking into account the absorption of THz radiation by free carriers and optical phonons, the spectrum of total mode losses has a wide minimum in the region of 3-6 THz, which shifts to the highfrequency region of the spectrum with increasing temperature. The postgrowth processing for THz QCL with Ag-Ag DMW are studied.
dc.identifier.citationSilver-based double metal waveguide for terahertz quantum cascade laser / Khabibullin, R. [et al.] // Proceedings of SPIE - The International Society for Optical Engineering. - 2019. - 11022. - 10.1117/12.2521774
dc.identifier.doi10.1117/12.2521774
dc.identifier.urihttps://www.doi.org/10.1117/12.2521774
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85063536037&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000464735700003
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/16778
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineering
dc.titleSilver-based double metal waveguide for terahertz quantum cascade laser
dc.typeConference Paper
dspace.entity.typePublication
oaire.citation.volume11022
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relation.isAuthorOfPublication82e59a49-b32c-4996-a1e5-25f94c444179
relation.isAuthorOfPublication.latestForDiscovery8ce84220-3c34-4278-83e7-c79be7660fe9
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