Dyakonov-Shur Instability in cylindrical Terahertz Field Effect Transistor with nonideal boundary condition

Dyakonov-Shur Instability in cylindrical Terahertz Field Effect Transistor with nonideal boundary condition | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Dyakonov-Shur Instability in cylindrical Terahertz Field Effect Transistor with nonideal boundary condition Liping Zhang, Bian Zhou, Meiling Zhang, Junyan Su This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8023319/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Abatract Terahertz (THz) plasma waves in field-effect transistors (FETs) have garnered significant attention in recent years due to their potential applications. This study investigates the instability of terahertz (THz) plasma waves in cylindrical FETs under nonideal boundary conditions. The dispersion relation describing the instability of THz plasma waves is obtained using a linearization method and quantum fluid dynamics equations governing the collective behavior of two-dimension electron gas in the cylindrical FETs’ channel. By combining the dispersion relation with the boundary conditions, the instability increment and the radiation frequency are investigated numerically. The numerical results indicate that under non-ideal boundary conditions, the plasma waves become unstable when the source capacitance exceeds the drain capacitance. Furthermore, the oscillation frequency of the plasma waves can be increased by either raising the electron temperature or increasing the mode number. This study provides valuable insights into the dynamics of plasma waves in cylindrical FETs, guiding future research and development efforts aimed at improving the performance and reliability of THz devices. Physical sciences/Engineering Physical sciences/Physics Full Text Additional Declarations Competing interest reported. The data used to support the results of this study have been included in the simulation section of the article. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8023319","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":549366466,"identity":"bd7a75e2-905b-4bf2-af34-c49a5c0da854","order_by":0,"name":"Liping Zhang","email":"","orcid":"","institution":"LanZhou University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Liping","middleName":"","lastName":"Zhang","suffix":""},{"id":549366467,"identity":"b7473a7d-5c3c-4777-a7a6-f8b1aa5080e1","order_by":1,"name":"Bian Zhou","email":"","orcid":"","institution":"LanZhou University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Bian","middleName":"","lastName":"Zhou","suffix":""},{"id":549366468,"identity":"ddb534c8-2cbd-4178-bce2-494eaa4d6ecb","order_by":2,"name":"Meiling Zhang","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAzElEQVRIiWNgGAWjYDACCTBpIccHptmI1yJhzMbATKKWxDaitcjPbn728GuORHqbRP4Bhg9lhxn4Zzfg18I455i5sew2idw2iWQGxhnnDjNI3DmAXwuzRIKZtCRUCzNv22EGA4kE/FrYJNK/gbSks4G0/CVGC49Ejpnkx20SCWAtjMRokZDIKZNm3CZh2Mbz2OBgz7l0HokbBLTIz0jfJvlzm408P3viwwc/yqzl+GcQ0AICzDxQxgGQSwmrBwLGH0QpGwWjYBSMghELAHDlN4qH7XEtAAAAAElFTkSuQmCC","orcid":"","institution":"LanZhou University of Technology","correspondingAuthor":true,"prefix":"","firstName":"Meiling","middleName":"","lastName":"Zhang","suffix":""},{"id":549366471,"identity":"fcb8f921-e9c2-45b3-909d-bf75dd1093a3","order_by":3,"name":"Junyan Su","email":"","orcid":"","institution":"LanZhou University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Junyan","middleName":"","lastName":"Su","suffix":""}],"badges":[],"createdAt":"2025-11-04 01:53:18","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8023319/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8023319/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":96588552,"identity":"ac72e6a5-65b6-47ca-84b9-94a64ef55106","added_by":"auto","created_at":"2025-11-24 05:52:52","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":417291,"visible":true,"origin":"","legend":"","description":"","filename":"DyakonovShurInstabilityincylindricalTerahertzFieldEffectTransistorwithnonidealboundarycondition.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8023319/v1/5eab1e6fd5fc8617148a2836.pdf"},{"id":96588551,"identity":"8d79e705-a698-4e9d-9869-88e4abfb834f","added_by":"auto","created_at":"2025-11-24 05:52:51","extension":"json","order_by":1,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":5519,"visible":true,"origin":"","legend":"","description":"","filename":"1d4e1e4a368f4eccb742a584f558387a.json","url":"https://assets-eu.researchsquare.com/files/rs-8023319/v1/caf7726c27ec1d3d780ac9ce.json"},{"id":97893308,"identity":"1ab2feaf-670d-4fd0-956f-d06a1851771e","added_by":"auto","created_at":"2025-12-10 15:29:51","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":453697,"visible":true,"origin":"","legend":"","description":"","filename":"DyakonovShurInstabilityincylindricalTerahertzFieldEffectTransistorwithnonidealboundarycondition.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8023319/v1_covered_904d1566-4e62-4e63-b1e6-ddf951dcb9e5.pdf"}],"financialInterests":"Competing interest reported. The data used to support the results of this study have been included in the simulation section of the article.","formattedTitle":"\u003cp\u003eDyakonov-Shur Instability in cylindrical Terahertz Field Effect Transistor with nonideal boundary condition\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-8023319/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8023319/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Abatract Terahertz (THz) plasma waves in field-effect transistors (FETs) have garnered significant attention in recent years due to their potential applications. This study investigates the instability of terahertz (THz) plasma waves in cylindrical FETs under nonideal boundary conditions. The dispersion relation describing the instability of THz plasma waves is obtained using a linearization method and quantum fluid dynamics equations governing the collective behavior of two-dimension electron gas in the cylindrical FETs’ channel. By combining the dispersion relation with the boundary conditions, the instability increment and the radiation frequency are investigated numerically. The numerical results indicate that under non-ideal boundary conditions, the plasma waves become unstable when the source capacitance exceeds the drain capacitance. Furthermore, the oscillation frequency of the plasma waves can be increased by either raising the electron temperature or increasing the mode number. This study provides valuable insights into the dynamics of plasma waves in cylindrical FETs, guiding future research and development efforts aimed at improving the performance and reliability of THz devices.","manuscriptTitle":"Dyakonov-Shur Instability in cylindrical Terahertz Field Effect Transistor with nonideal boundary condition","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-11-24 05:52:47","doi":"10.21203/rs.3.rs-8023319/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"3d611709-0061-41df-a9c9-bf1c3e3b9ba9","owner":[],"postedDate":"November 24th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":58478318,"name":"Physical sciences/Engineering"},{"id":58478319,"name":"Physical sciences/Physics"}],"tags":[],"updatedAt":"2025-12-08T11:53:41+00:00","versionOfRecord":[],"versionCreatedAt":"2025-11-24 05:52:47","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-8023319","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8023319","identity":"rs-8023319","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}