Terahertz plasma waves velocity control in a metal-semiconductor wedge waveguide with diffusively-pumped graphene

Terahertz plasma waves velocity control in a metal-semiconductor wedge waveguide with diffusively-pumped graphene | 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 Research Article Terahertz plasma waves velocity control in a metal-semiconductor wedge waveguide with diffusively-pumped graphene Mikhail Yu. Morozov, Alyona S. Bannikova This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7555944/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 Velocity control and deceleration of terahertz plasma waves (plasmons) in the metal-semiconductor wedge waveguide with diffusion-pumped graphene is theoretically studied. We show the possibility of tuning the velocity of plasmons via diffusion pumping of graphene from the wedged semiconductor. The velocity of the plasmons in the wedge waveguide inlet terminal can be fully matched to the velocity of the rapid enough (with the velocities of about 0.07 of the speed of light) terahertz plasmons which can be excited in vicinity of the inlet terminal of the wedge waveguide by a dielectric prism with relatively low optical density in the attenuated total reflection regime. It was shown that rapid terahertz plasmon excited in the inlet terminal can be efficiently slowed down while moving toward the wedge apex (the plasmon phase velocity becomes almost an order of magnitude smaller near the outlet terminal of the wedge waveguide compared its value in the inlet terminal). The deceleration of terahertz plasmon is caused by two factors: first, increasing of screening of the plasma wave near the wedge apex by the metal and, secondly, decreasing the plasmon velocity due to the gradient of free carrier concentration in graphene realized by graphene pumping in the wedge structure. The studied control of terahertz plasmons is in demand for better manipulation of these waves, enabling the design of THz modulators, phase shifters, sensors etc. plasmon terahertz graphene wedge velocity control diffusion pumping Full Text Additional Declarations No competing interests reported. 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. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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-7555944","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":516247609,"identity":"0f8ec93a-871e-4f17-b52c-e143aff74566","order_by":0,"name":"Mikhail Yu. 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