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dc.contributor.advisorHeikkilä, Tero
dc.contributor.advisorOjajärvi, Risto
dc.contributor.authorMousa, Amr
dc.date.accessioned2022-03-30T05:27:11Z
dc.date.available2022-03-30T05:27:11Z
dc.date.issued2022
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/80427
dc.description.abstractStrain has been known to modify the electric and optical properties of graphene. This phenomenon has attracted interest to modifying graphene properties using specific forms of strains (known as strain-engineering), and measuring strain in graphene. In this thesis, I present a calculation of the optical properties of strained graphene, where the effects of strain can be seen in the optical conductivity and thus the reflectivity of graphene. To do this, I use the tight-binding model to obtain the Dirac Hamiltonian of the charge carriers in graphene. Then I deduce the effects of in-plane strain as a pseudo-magnetic field potential and use this result to add strain as a perturbation to the Hamiltonian of pristine graphene. Using the perturbed Hamiltonian, I calculate the optical conductivity of graphene for a specific strain field with a $y$-component that is periodic in $x$. I obtain the optical conductivity numerically for different amplitudes of the strain, and use them to find the reflectivity. The results indicate that the effects of strain on reflectivity can be measured experimentally, and that such measurements can reveal information about the amplitude and period of the strain.en
dc.format.extent56
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.titleOptical response of graphene under strain
dc.identifier.urnURN:NBN:fi:jyu-202203302111
dc.type.ontasotPro gradu -tutkielmafi
dc.type.ontasotMaster’s thesisen
dc.contributor.tiedekuntaMatemaattis-luonnontieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sciencesen
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.oppiaineTeoreettinen fysiikkafi
dc.contributor.oppiaineTheoretical Physicsen
dc.rights.copyrightJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.rights.copyrightThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.type.publicationmasterThesis
dc.contributor.oppiainekoodi4024
dc.subject.ysografeeni
dc.subject.ysooptiset ominaisuudet
dc.subject.ysooptiikka
dc.subject.ysonanorakenteet
dc.subject.ysosähkönjohtavuus
dc.subject.ysohiili
dc.subject.ysographene
dc.subject.ysooptical properties
dc.subject.ysooptics
dc.subject.ysonanostructures
dc.subject.ysoelectric conductivity
dc.subject.ysocarbon
dc.format.contentfulltext
dc.type.okmG2


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