Metalloporphyrin polymer with temporally agile, broadband nonlinear absorption for optical limiting in the near infrared
Author(s)
Hales, Joel M.
Cozzuol, Matteo
Screen, Thomas E. O.
Anderson, Harry L.
Perry, Joseph W.
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Abstract
A lead bis(ethynyl)porphyrin polymer possesses strong nonlinear absorption with unprecedented spectral/temporal coverage as a result of broad, overlapping two-photon and excited-state absorption bands with favorable excited-state dynamics. Consequently, this material exhibits effective optical limiting over a range of about 500 nm in the near infrared (ca. 1050–1600 nm) and for laser pulsewidths spanning from 75 fs to 40 ns. Introduction of the material in a waveguide device geometry results in a strong optical limiting response.
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Date
2009-10
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