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Meso-Tetra-Alkynyl Porphyrins for Optical Limiting—A Survey of Group III and IV Metal Complexes
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2001
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Optical MaterialsEngineeringLaser ScienceLaser PhysicsGroup IiiOrganic ChemistryChemistryIv Metal ComplexesMeso-tetra-alkynyl PorphyrinsChemical EngineeringLight 48Optical PropertiesOptical SpectroscopyPhotophysical PropertyInorganic ChemistryPhotonicsPhotochemistryPhysicsNon-linear OpticUltrafast Laser PhysicsLaser PhotochemistryNatural SciencesOptical PhysicCoordination ComplexApplied PhysicsMolecular ComplexUltrafast OpticsGround StateIndium Porphyrin 1
Indium porphyrin 1 is an excellent optical limiterat visible wavelengths (480–620 nm). Absorption of light results in quantitative formation of the triplet excited state, which absorbs light 48 times more strongly than the ground state and has a lifetime of 0.8 ms. This should provide strong nonlinear attenuation of laser pulses on picosecond to microsecond timescales.