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Two-Photon Absorption in Graphene Enhanced by the Excitonic Fano Resonance
Chen, Weiqiang1; Wang, Yu2; Ji, Wei1
2015-07-23
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume119Issue:29Pages:16954-16961
AbstractWe report our observation of two-photon absorption (2PA) in graphene enhanced by the excitonic Fano resonance at the saddle point with femtosecond laser pulses in the spectral range from 1.8 to 2.9 eV (or, from 435 to 700 nm). On the basis of the second-order, time-dependent perturbation theory on interband transitions among three states near the saddle point of two-dimensional systems (used in the Bassani-Hassan theoretical model), we develop a semiempirical model to take excitons in graphene into consideration. We find that the model is in agreement with the photon-energy dependence of the observed 2PA spectrum with a scaling factor of B = (1-5) x 10(2) cm/MW/eV(5).
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/acs.jpcc.5b03819
Indexed BySCI
Language英语
WOS KeywordCHEMICAL-VAPOR-DEPOSITION ; LARGE-AREA ; EPITAXIAL GRAPHENE ; HIGH-QUALITY ; FILMS ; SPECTROSCOPY ; REFRACTION
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000358624000062
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19411
Collection多相复杂系统国家重点实验室
Affiliation1.Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Chen, Weiqiang,Wang, Yu,Ji, Wei. Two-Photon Absorption in Graphene Enhanced by the Excitonic Fano Resonance[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2015,119(29):16954-16961.
APA Chen, Weiqiang,Wang, Yu,&Ji, Wei.(2015).Two-Photon Absorption in Graphene Enhanced by the Excitonic Fano Resonance.JOURNAL OF PHYSICAL CHEMISTRY C,119(29),16954-16961.
MLA Chen, Weiqiang,et al."Two-Photon Absorption in Graphene Enhanced by the Excitonic Fano Resonance".JOURNAL OF PHYSICAL CHEMISTRY C 119.29(2015):16954-16961.
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