Proceedings of the Optical Society of Korea Conference (한국광학회:학술대회논문집)

Optical Society of Korea (한국광학회)
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Nonlinear absorption in charge transfer films

  • Cha, M. (Insitute for Polymers and Organic Solids University of California at Santa Barbara) ;
  • Sariciftici, N.S. (Insitute for Polymers and Organic Solids University of California at Santa Barbara) ;
  • Heeger, A.J. (Insitute for Polymers and Organic Solids University of California at Santa Barbara) ;
  • Hummelen, J.C. (Insitute for Polymers and Organic Solids University of California at Santa Barbara) ;
  • WudI, F. (Insitute for Polymers and Organic Solids University of California at Santa Barbara)
  • Published : 1995.06.01
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Abstract

Nonlinear optical absorption in solid films of poly(3-octyl thiophene) (P3OT) sensitized with methanofullerene was inverstigated for wacelengths from 620 to 960nm. The nonlinear absorption is ehnanced over that in either of the component materials by more than two orders orders of magitude at 760nm. The large nonlinearity results from effient photoinduced interm olecular charge transfer from P3OT to methanofullerene, followed by absorption in the charge separated excited state. P3OT/fullerene films are promising as reverse saturable absorbers and the optical limiting performance is demonstrated at 760nm.

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