π-Plasmon model for carbon nano structures: Application to porphyrin

In traditional concept, the optical properties of semiconductors and semimetals near their fundamental optical band gaps are attributed to single excitations (such electron-hole pairs, excitons...). In our earlier article, we proposed the collective mechanism of π-plasmons for optical properties of...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 726; no. 1; pp. 12006 - 12011
Main Authors Ha, Dao Thu, Anh, Chu Thuy, Nga, Do Thi, Thanh, Le Minh, Van, Tran Thi Thanh, Viet, Nguyen Ai
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.06.2016
Subjects
Absorption spectra
Carbon
Excitons
Holes (electron deficiencies)
Metalloids
Optical properties
Physics
Plasmons
Porphyrins
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Summary:In traditional concept, the optical properties of semiconductors and semimetals near their fundamental optical band gaps are attributed to single excitations (such electron-hole pairs, excitons...). In our earlier article, we proposed the collective mechanism of π-plasmons for optical properties of low dimensional carbon nano structures. A simple way to calculate the peak positions of UV-vis absorption spectra was pointed out and gave a good agreement with experimental data. In this work we analyze different schemas to calculate the UV-vis absorption peaks. A new parameter k which characterizes the dependence of schema on geometry and number of carbon sites is defined. As an example, the case of porphyrin was investigated.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/726/1/012006