Journal of Physics: Conference Series 726, 012006 (2016)

ISSN: 1742-6596

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

Dao Thu Ha, Chu Thuy Anh, Do Thi Nga, Le Minh Thanh , Tran Thi Thanh Van, Nguyen Ai Viet

In traditional concept, the optical properties of semiconductors and semimetals near their fundamental optical band gaps are attributed to single excitations (such electronhole 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.

DOI: 10.1088/1742-6596/726/1/012006

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