Two-dimensional two-photon absorptions and third-order nonlinear optical properties of Ih fullerenes and fullerene onions
Autor: | Ling Yang, Wei Quan Tian, Xue-Lian Zheng, Yingli Niu, Bo Shang, Ming-Qian Wang, Weiqi Li |
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Rok vydání: | 2020 |
Předmět: |
Fullerene
Materials science Absorption spectroscopy General Physics and Astronomy Hyperpolarizability 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Symmetry (physics) 0104 chemical sciences Third order Wavelength Two-photon excitation microscopy Physics::Space Physics Physics::Atomic and Molecular Clusters ZINDO Physical and Theoretical Chemistry 0210 nano-technology |
Zdroj: | Physical Chemistry Chemical Physics. 22:14225-14235 |
ISSN: | 1463-9084 1463-9076 |
Popis: | The third order static and dynamic nonlinear optical (NLO) responses of Ih symmetry fullerenes (C60, C240, and C540) and fullerene onions (C60@C240 and C60@C240@C540) are predicted using the ZINDO method and the sum-over-states model. The static second hyperpolarizability of Ih symmetry fullerenes increases exponentially with fullerene size [from 10.00 × 10−34 esu in C60 to 3266.74 × 10−34 esu ≈ γ0(C60) × 92.63 in C540]. The external fields of strong third order NLO responses of Ih symmetry fullerenes change from ultra-violet (C60) to the visible region (C540) as the fullerene size increases. The outer layer fullerene in the fullerene onions has dominant contributions to the third order NLO properties of the fullerene onions, and the inter-shell charge-transfer excitations have conspicuous contributions to the third order NLO properties. The two-dimensional two-photon absorption spectra of C60 and C240 show that those fullerenes have strong two-photon absorptions in the visible region with short wavelength and in the ultra-violet region. |
Databáze: | OpenAIRE |
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