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 in:Journal of physics. Conference series 2016-06, Vol.726 (1), p.12006
Main Authors: Ha, Dao Thu, Anh, Chu Thuy, Nga, Do Thi, Thanh, Le Minh, Van, Tran Thi Thanh, Viet, Nguyen Ai
Format: Article
Language:English
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