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Photon energy upconversion in porphyrins: one-photon hot-band absorption versus two-photon absorption

PhotonicsEngineeringPhysicsPhotochemistryOptical PropertiesNatural SciencesExcitation Energy TransferUpconversion LuminescenceOne-photon Hot-band AbsorptionLight AbsorptionChemistryTwo-photon AbsorptionPhotophysical PropertyPhoton Energy Upconversion