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Proceedings Paper

Third-order nonlinear spectra in C60 and C70: reconciling electroabsorption, third-harmonic generation and degenerate four-wave mixing spectra
Author(s): Bret C. Hess; Don V. Bowersox; Shant H. Mardirosian; Lawrence D. Unterberger
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Paper Abstract

We present an overview of what has been learned form nonlinear optical spectral studies in C60 and C70 by our group and others. These include third harmonic generation (THG), degenerate four-wave mixing (DFWM), and electroabsorption (EA). We present empirical models of interacting states consistent with spectra of EA, THG, and DFWM in C60 and C70. The spectra in the dispersed and solid forms differ significantly. In C60 the lowest- energy resonances in (chi) (3_ are dominated by 'forbidden' transitions made allowed by vibronic coupling in the molecule and intermolecular coupling in the solid. These interactions must be included in theoretical models of C60 if comparison is to be made between calculated and experimental nonlinear optical spectra. Major features of (chi) (3) spectra in C70 can be modeled with similar states redshifted from those of C60.

Paper Details

Date Published: 16 December 1996
PDF: 13 pages
Proc. SPIE 2854, Fullerenes and Photonics III, (16 December 1996); doi: 10.1117/12.262995
Show Author Affiliations
Bret C. Hess, Brigham Young Univ. (United States)
Don V. Bowersox, California State Univ./Fresno (United States)
Shant H. Mardirosian, California State Univ./Fresno (United States)
Lawrence D. Unterberger, California State Univ./Fresno (United States)


Published in SPIE Proceedings Vol. 2854:
Fullerenes and Photonics III
Zakya H. Kafafi, Editor(s)

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