Third-order nonlinear optical properties of highly electron deficient, nonplanar push–pull porphyrins: β-nitro-hexa-substituted porphyrins bearing bromo, phenyl, and phenylethynyl groups
Renu Kumari Rohal, Dipanjan Banerjee, Nivedita Rana, Venugopal Rao Soma, Muniappan Sankar
Abstract
β-Heptasubstituted porphyrins were synthesized and their third-order nonlinear optical (NLO) properties were explored. The existence of enhanced polarization and intramolecular charge transfer are held responsible for the observed strong NLO responses.
Topics & Concepts
Two-photon absorptionZ-scan techniqueAbsorption (acoustics)FemtosecondChemistryRefractive indexPhotonNonlinear opticsHEXAMolecular physicsPhotonicsAttenuation coefficientAtomic physicsOpticsMaterials scienceOptoelectronicsPhysicsLaserCrystallographyNonlinear Optical Materials StudiesPorphyrin and Phthalocyanine ChemistryNonlinear Optical Materials Research