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Article: Phonon coherence and new set of sidebands in phonon-assisted photoluminescence

TitlePhonon coherence and new set of sidebands in phonon-assisted photoluminescence
Authors
KeywordsPhysics
Issue Date2005
PublisherInstitute of Physics Publishing Ltd.. The Journal's web site is located at http://iopscience.iop.org/0295-5075
Citation
Europhysics Letters, 2005, v. 71 n. 3, p. 459-465 How to Cite?
AbstractWe investigate excitonic polaron states comprising a local exciton and phonons in the longitudinal optical (LO) mode by solving the Schrödinger equation. We derive an exact expression for the ground state (GS), which includes multi-phonon components with coefficients satisfying the Huang-Rhys factors. The recombination of GS and excited polaron states gives one set of sidebands in photoluminescence (PL): the multi-phonon components in the GS produce the Stokes lines and the zero-phonon components in the excited states produce the anti-Stokes lines. By introducing the mixing of the LO mode and environal phonon modes, the exciton will also couple with the latter, arid the resultant polaron states result in another set of phonon sidebands. This set has a zero-phonon line higher and wider than that of the first set due to the tremendous number of the environal modes. The energy spacing between the zero-phonon lines of the first and second sets is proved to be the binding energy of the GS state. The common exciton origin of these two sets can be further verified by a characteristic Fano lineshape induced by the coherence in the mixing of the LO and the environal modes. © EDP Sciences.
Persistent Identifierhttp://hdl.handle.net/10722/45277
ISSN
2015 Impact Factor: 1.963
2015 SCImago Journal Rankings: 0.565
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXiong, SJen_HK
dc.contributor.authorXu, SJen_HK
dc.date.accessioned2007-10-30T06:21:34Z-
dc.date.available2007-10-30T06:21:34Z-
dc.date.issued2005en_HK
dc.identifier.citationEurophysics Letters, 2005, v. 71 n. 3, p. 459-465en_HK
dc.identifier.issn0295-5075en_HK
dc.identifier.urihttp://hdl.handle.net/10722/45277-
dc.description.abstractWe investigate excitonic polaron states comprising a local exciton and phonons in the longitudinal optical (LO) mode by solving the Schrödinger equation. We derive an exact expression for the ground state (GS), which includes multi-phonon components with coefficients satisfying the Huang-Rhys factors. The recombination of GS and excited polaron states gives one set of sidebands in photoluminescence (PL): the multi-phonon components in the GS produce the Stokes lines and the zero-phonon components in the excited states produce the anti-Stokes lines. By introducing the mixing of the LO mode and environal phonon modes, the exciton will also couple with the latter, arid the resultant polaron states result in another set of phonon sidebands. This set has a zero-phonon line higher and wider than that of the first set due to the tremendous number of the environal modes. The energy spacing between the zero-phonon lines of the first and second sets is proved to be the binding energy of the GS state. The common exciton origin of these two sets can be further verified by a characteristic Fano lineshape induced by the coherence in the mixing of the LO and the environal modes. © EDP Sciences.en_HK
dc.format.extent384882 bytes-
dc.format.extent1935 bytes-
dc.format.extent6153 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing Ltd.. The Journal's web site is located at http://iopscience.iop.org/0295-5075 en_HK
dc.relation.ispartofEurophysics Lettersen_HK
dc.rightsEurophysics Letters. Copyright © E D P Sciences.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsThe original publication is available at www.edpsciences.orgen_HK
dc.subjectPhysicsen_HK
dc.titlePhonon coherence and new set of sidebands in phonon-assisted photoluminescenceen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0295-5075&volume=71&issue=3&spage=459&epage=465&date=2005&atitle=Phonon+coherence+and+new+set+of+sidebands+in+phonon-assisted+photoluminescenceen_HK
dc.identifier.emailXu, SJ: sjxu@hku.hken_HK
dc.identifier.authorityXu, SJ=rp00821en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1209/epl/i2005-10099-9en_HK
dc.identifier.scopuseid_2-s2.0-23644450580en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-23644450580&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume71en_HK
dc.identifier.issue3en_HK
dc.identifier.spage459en_HK
dc.identifier.epage465en_HK
dc.identifier.isiWOS:000231108800019-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridXiong, SJ=7202791585en_HK
dc.identifier.scopusauthoridXu, SJ=7404439005en_HK

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