Dispersion of the Third-Order Nonlinear Optical Susceptibility in C60 Calculated with a Tight-Binding Model
- 1 July 1992
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 31 (7A) , L887
- https://doi.org/10.1143/jjap.31.l887
Abstract
The frequency dependence of third harmonic generation (THG) in C60 is calculated, making use of a tight-binding model for π-electrons. The magnitudes of the THG, about 10-12 esu, near zero frequency, agree with those in experiments for the low-energy region. We can also explain the order of the magnitude, 10-11 esu, around the three-photon resonance peak due to the lowest allowed excitation, recently measured by Meth et al. At higher energies, we predict a large enhancement of the THG at 3ω∼6 eV as a result of double resonance enhancement.Keywords
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