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Polymer Materials Design for Optical Limiting

Published online by Cambridge University Press:  03 September 2012

B. H. Cumpston ,
K. Mansour ,
A. A. Heikal  and
J. W. Perry
B. H. Cumpston
Affiliation:
Beckman Institute, California Institute of Technology, Pasadena, CA 91125
K. Mansour
Affiliation:
Beckman Institute, California Institute of Technology, Pasadena, CA 91125
A. A. Heikal
Affiliation:
Beckman Institute, California Institute of Technology, Pasadena, CA 91125
J. W. Perry
Affiliation:
Beckman Institute, California Institute of Technology, Pasadena, CA 91125 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109
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Abstract

Phthalocyanines (PC's) containing heavy metal central atoms have recently been recognized as leading candidates for reverse saturable absorption and optical limiting (OL) applications in the visible spectrum. Strong triplet excited state absorption brought about by a large intersystem crossing rate is responsible for the excellent limiting performance of these molecules. Moreover, devices which maximize the excited state population along the light path will demonstrate maximum limiting efficiency. A non-homogeneous distribution of indium tetra(tert-butyl) phthalocyanine chloride (InC1PC) has been shown to be very effective in attenuating 532 nm nanosecond laser pulses. This was accomplished by approximating a hyperbolic distribution of chromophores using discrete elements of fixed dye concentration. Greater OL should be achieved by fabricating materials containing a continuous concentration gradient of chromophore. This paper focuses on issues concerning the preparation of solid polymeric materials that contain such a chromophore gradient. This design is achieved by diffusing chromophore-containing solutions into partially polymerized poly(methyl methacrylate) (PMMA).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 479: Symposium S – Materials for Optical Limiting II , 1997 , 89
Copyright
Copyright © Materials Research Society 1997

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References

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