title: Photoinduced absorption and photoinduced reflectance in conducting polymer/methanofullerene films: Nonlinear-optical changes in the complex index of refraction.
authors.initials: K
authors.lastname: Lee
authors.initials: EK
authors.lastname: Miller
authors.initials: NS
authors.lastname: Sariciftci
authors.initials: JC
authors.lastname: Hummelen
authors.initials: F
authors.lastname: Wudl
authors.initials: AJ
authors.lastname: Heeger