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Optical Limiting in Phthalocyanine Solutions and in Pure Liquid Phthalocyanines

  • Steven R. Flom (a1), Richard G. S. Pong (a1), James S. Shirk (a1), F. J. Bartoli (a1), R. F. Cozzens (a2), Michael E. Boyle (a2) and Arthur W. Snow (a2)...

Abstract

Optical limiting, degenerate four-wave mixing and transient absorption experiments have been performed on a neat liquid lead substituted phthalocyanine. The photophysical mechanisms responsible for the good optical limiting observed in other phthalocyanine solutions are maintained in this pure liquid despite its different peripheral substitution pattern. The liquid is shown to have excited state absorption cross sections that exceed those of the ground state through much of the visible spectrum. Hybrid absorptive/refractive nonlinear response is demonstrated to contribute to both the four-wave mixing and optical limiting response. The mechanism and states responsible are discussed.

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1. Flom, S.R., Bartoli, F.J., Sarkas, H.W., Merritt, C.D., Kafafi, Z.H., Phys. Rev. B 51 11376 (1995).
2. Shirk, J.S., Pong, R.G.S., Bartoli, F.J., Snow, A.W., Appl. Phys. Lett. 63 1880 (1993).
3. Fayer, M.D. IEEE J. Quantum Electron. QE22 1437 (1986) and references therein.
4. Turro, N.J. Modern Molecular Photochemistry Benjamin/Cummings, Menlo Park, CA 1978.
5. Pong, R.G.S., Shirk, J.S., Flom, S.R. Snow, A.W., Proc. Mat. Res. Soc. This volume.

Optical Limiting in Phthalocyanine Solutions and in Pure Liquid Phthalocyanines

  • Steven R. Flom (a1), Richard G. S. Pong (a1), James S. Shirk (a1), F. J. Bartoli (a1), R. F. Cozzens (a2), Michael E. Boyle (a2) and Arthur W. Snow (a2)...

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