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[{"key": "dc.contributor.advisor", "value": "Heikkil\u00e4, Tero", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Asikainen, Aili", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2016-11-10T09:59:51Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2016-11-10T09:59:51Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2016", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1642688", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/51851", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Pintaplasmonipolaritonit (SPP) ovat metallin ja dielektrisen aineen, esim. ilma, rajapintaan\r\nsyntyvi\u00e4 s\u00e4hk\u00f6magneettisia aaltoja. T\u00e4m\u00e4 ty\u00f6 k\u00e4sittelee SPP:en ja molekyylien v\u00e4list\u00e4\r\nvuorovaikutusta vahvan kytkenn\u00e4n rajalla. Vahvan kytkenn\u00e4n rajalla systeemin energiatilat\r\nmuodostavat uusia hybriditiloja. N\u00e4it\u00e4 uusia tiloja voidaan hy\u00f6dynt\u00e4\u00e4 mm. kemiallisten\r\nreaktioiden muokkaamisessa ja kvantti-informatioteknologiassa.\r\n\r\nEr\u00e4s SPP:en ominaisuus on, ett\u00e4 ne voivat l\u00e4hett\u00e4\u00e4 vain p-polarisoitunutta valoa.\r\nViimeaikaisissa tutkimuksissa on kuitenkin havaittu SPP\u2013molekyyli-systeemin l\u00e4hett\u00e4v\u00e4n\r\nmy\u00f6s s-polarisoitunutta valoa. Yksi t\u00e4m\u00e4n ty\u00f6n tavoitteista oli l\u00f6yt\u00e4\u00e4 prosessi, joka selitt\u00e4isi s-polarisoituneen valon mikroskooppisen alkuper\u00e4n. T\u00e4t\u00e4 varten muodostin systeemille markovilaisen kvanttimekaanisen master-yht\u00e4l\u00f6n Lindbladin muodossa.\r\n\r\nLindbladin yht\u00e4l\u00f6 kuvaa systeemin tiheysmatriisin aikakehityst\u00e4, kun systeemi on kytketty\r\nulkoiseen kylpyyn erilaisten dissipaatioprosessien my\u00f6t\u00e4. Tarkastelemassani systeemiss\u00e4\r\nt\u00e4llaisia dissipaatioprosesseja ovat SPP:n ja molekyylien viritystilojen purkautuminen ulkoiseen fotonikentt\u00e4\u00e4n. Vastaavasti ulkoinen fotonikentt\u00e4 voi viritt\u00e4\u00e4 systeemin hybriditilalle. Lis\u00e4sin Lindbladin yht\u00e4l\u00f6\u00f6n my\u00f6s prosessin, joka sekoittaa tilan kvanttimekaanisen vaiheen. Se v\u00e4hent\u00e4\u00e4 systeemin kvanttitilojen interferenssi\u00e4, mutta ei muuta systeemin energiaa. T\u00e4m\u00e4 prosessi syntyy elastista t\u00f6rm\u00e4yksist\u00e4 molekyylien ja metallin kidev\u00e4r\u00e4htelyiden, fononien, v\u00e4lill\u00e4. Toisaalta molekyylit ja fononit voivat my\u00f6s t\u00f6rm\u00e4t\u00e4 ep\u00e4elastisesti.\r\n\r\nRatkaisin Lindbladin yht\u00e4l\u00f6n numeerisesti kahden molekyylin tapauksessa. Numeerisen ratkaisun p\u00e4\u00e4tuloksena sain, ett\u00e4 kun dissipaatioprosessit tapahtuvat riitt\u00e4v\u00e4n hitaasti\r\nverrattuna systeemin sis\u00e4iseen kytkent\u00e4\u00e4n, tiheysmatriisin ei-diagonaaliset alkiot ovat niin\r\npieni\u00e4, ett\u00e4 ne voi j\u00e4tt\u00e4\u00e4 huomioimatta. Olettaen, ett\u00e4 ei-diagonaali alkiot ovat pieni\u00e4,\r\nl\u00f6ysin Lindbladin yht\u00e4l\u00f6n station\u00e4\u00e4risen ratkaisun, kun molekyylien lukum\u00e4\u00e4r\u00e4 on suuri.\r\nT\u00e4m\u00e4n tuloksen avulla huomasin, ett\u00e4 muodostamani termi kvanttimekaanisen vaiheen\r\nsekoittumiselle ei luo s-polarisoitunutta valoa.\r\n\r\nL\u00f6ysin Lindbladin yht\u00e4l\u00f6\u00f6n lis\u00e4tt\u00e4v\u00e4n termin, jonka seurauksena systeemi l\u00e4hett\u00e4\u00e4\r\ns-polarisoitunutta valoa. Esit\u00e4n, ett\u00e4 t\u00e4llainen termi voi olla korjaustermi, joka johtuu\r\nfotonikent\u00e4n \u00e4\u00e4rellisest\u00e4 korrelaatiopituudesta. T\u00e4m\u00e4 korjaus n\u00e4ytt\u00e4isi silt\u00e4 kuin molekyylit olisivat kytkeytyneet erillisiin fotonikenttiin. Ratkaisin analyyttisesti Lindbladin yht\u00e4l\u00f6n, joka sis\u00e4lsi korjaustermin, mutta ei vaiheen sekoittumista. Ratkaisun avulla sain suhteen eri polarisaatiosuuntiin l\u00e4hetetylle valolle, t\u00e4m\u00e4 suhde riippuu mm. SPP:n polarisaatiosta ja dissipaatioprosessien nopeuksista.\r\n\r\nTy\u00f6ssa saatujen tulosten avulla voidaan jatkaa SPP\u2013molekyyli-systeemin teoreettisen\r\nmallin kehityst\u00e4. T\u00e4rke\u00e4\u00e4 on ymm\u00e4rt\u00e4\u00e4 tarkemmin lis\u00e4tyn korjaustermi mikroskooppinen\r\nperusta, jotta mallia voi testata kokeellisesti, sek\u00e4 pohtia muita mahdollisia Lindblad\r\nyht\u00e4l\u00f6n termej\u00e4.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "This thesis provides an introduction to strong coupling between surface plasmon polaritons\r\n(SPP) and molecules. In the strong coupling limit the energy levels of the system change\r\nto form new hybridstates. These new states can be used for example to control chemical\r\nreactions and in quantum-information technology. One property of the SPPs is that they\r\ncan only be p-polarized. However, in recent experiments the strong coupling system has\r\nbeen found to also emit s-polarized light. One goal of this thesis is to find a process that\r\nwould explain the microscopic origin of the s-polarized light. We construct a Markovian\r\nquantum master equation of the Lindblad kind for the strong coupling system. Lindblad\r\nequation is describes the time evolution of the density matrix of the system, when the\r\nsystem is coupled to an external bath through dissipative processes. The Lindblad equation\r\nthat we construct includes decay of the SPP and molecules into an external photon field,\r\ndephasing process and inelastic scattering of the molecules with phonons. The dephasing\r\nprocess causes loos of interference in the system but does not change energy. Using both a\r\nnumerical and an analytical treatment of the Lindblad equation we find that dephasing is\r\nnot enough to produce s-polarized light. We are able to find a Lindblad term that allows\r\nthe emission of s-polarised light. We argue that this term is a correction due to the finite\r\ncorrelation length of the external photon field.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Aili Asikainen (aiemasik) on 2016-11-10 09:59:50.738825. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2016-11-10T09:59:51Z\r\nNo. of bitstreams: 2\r\nURN:NBN:fi:jyu-201611104604.pdf: 1509935 bytes, checksum: 4c26e54042f76e5ffec5a45737f8a57f (MD5)\r\nlicense.html: 4851 bytes, checksum: 8c2038b98846a7f0ec35157d9b5a74cc (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2016-11-10T09:59:51Z (GMT). No. of bitstreams: 2\r\nURN:NBN:fi:jyu-201611104604.pdf: 1509935 bytes, checksum: 4c26e54042f76e5ffec5a45737f8a57f (MD5)\r\nlicense.html: 4851 bytes, checksum: 8c2038b98846a7f0ec35157d9b5a74cc (MD5)\r\n Previous issue date: 2016", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (53 sivua)", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "pintaplasmonipolaritonit", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Strong coupling between surface plasmon polaritons and molecules : Lindblad equation approach", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-201611104604", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Fysiikan laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Physics", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Fysiikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Physics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2016-11-10T09:59:52Z", "language": "", "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": "fi", "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4021", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "molekyylit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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