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The Third‐Order Nonlinear Optical Susceptibility of C 60 ‐Derived Nanotubes
Author(s) -
Wan Xiangang,
Dong Jinming,
Jiang Jie,
Xing D. Y.
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199702)199:2<571::aid-pssb571>3.0.co;2-y
Subject(s) - polarizability , nonlinear system , fullerene , dispersion (optics) , order (exchange) , atom (system on chip) , molecular physics , spectral line , nanotube , condensed matter physics , symmetry (geometry) , materials science , physics , quantum mechanics , carbon nanotube , atomic physics , nanotechnology , mathematics , molecule , geometry , finance , computer science , economics , embedded system
Abstract Using the extended Su‐Schrieffer‐Heeger (SSH) model and the sum‐over‐state (SOS) method, we have calculated the third‐order nonlinear polarizability γ and its dispersion spectra for C 60 ‐derived nanotubes, which is one of the narrowest tubes. Our numerical calculations indicate that both symmetry and size of the nanotubes have great effect on the third‐order nonlinear polarizability γ spectra. We find that with increasing size, both static γ values and dynamical response peak values increase. When the atom number of the C 60 ‐derived nanotubes is 140, the static γ value is about 65 times larger than that of C 60 , and the highest peak value of γ (at 3ω = 3.52 eV) is about three orders larger than that of C 60 . So, C 60 ‐derived nanotubes may become a kind of good nonlinear optical materials.