Nonlinear optical response in higher fullerenes

Abstract

Nonlinear optical properties of extracted higher fullerenes - C70, C76, C78, and C84 - are theoretically investigated. Magnitudes of off-resonant third-harmonic-generation are calculated by the intermediate exciton theory. We find that optical nonlinearities of higher fullerenes are a few times larger than those of C60. The magnitudes of nonlinearity tend to increase as the optical gap decreases in higher fullerenes.Comment: Condensed Matter Theory Group at ETL: http://www.etl.go.jp/Organization/Bussei-kiso