Optical limiting materials

Details Optical limiting materials Optical limiting materials

1995-07-11

1998-04-21

Tucker, Philip

Compositions

Light transmission modifying compositions

359885, F21V 900, G02B 522

Patent

active

057414424

ABSTRACT:
Optical limiting materials. Methanofullerenes, fulleroids and/or other fullerenes chemically altered for enhanced solubility, in liquid solution, and in solid blends with transparent glass (SiO.sub.2) gels or polymers, or semiconducting (conjugated) polymers, are shown to be useful as optical limiters (optical surge protectors). The nonlinear absorption is tunable such that the energy transmitted through such blends saturates at high input energy per pulse over a wide range of wavelengths from 400-1100 nm by selecting the host material for its absorption wavelength and ability to transfer the absorbed energy into the optical limiting composition dissolved therein. This phenomenon should be generalizable to other compositions than substituted fullerenes.

REFERENCES:
patent: 5172278 (1992-12-01), Tutt
patent: 5364993 (1994-11-01), Zhang et al.
patent: 5391329 (1995-02-01), Dougherty et al.
patent: 5420081 (1995-05-01), Mattes et al.
Cha et al., Chemical Abstract 124:70848K, Abstract of Appl. Phys. Lett., (1995), 67(26), pp. 3850-3852.

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