2012 Fiscal Year Final Research Report
Dynamical electron correlation and optical response in carbon nanostructures
| Project Area | Optical science of dynamically correlated electrons in semiconductors |
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| Project/Area Number |
20104009
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2008 – 2012
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| Keywords | カーボンナノチューブ / グラフェン / 量子細線 / 量子井戸 / 光学応答 / 励起子 |
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| Research Abstract |
Optical properties of carbon nanotubes and graphene, which are novel low-dimensional material composed of carbon atoms, have theoretically been studied and compared with those of semiconductor-compound quantum structures. In carbon nanotubes, its one-dimensionality strongly enhances the interaction effect so that they have higher potential for external-field control of the optical responses. Absorption coefficient of monolayer graphene is known to have a universal value proportional to the fine-structure constant. This study has clarified that the continuum absorption of band-to-band transitions in semiconductor quantum wells also has the same value.
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