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Two-photon absorption of a supramolecular pseudoisocyanine J-aggregate assembly |
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| Authors: | Kevin D Belfield Mykhailo V Bondar Florencio E Hernandez Olga V Przhonska Sheng Yao |
| Institution: | aDepartment of Chemistry and College of Optics and Photonics: CREOL and FPCE, University of Central Florida, P.O. Box 162366, Orlando, FL 32816-2366, USA bInstitute of Physics, Prospect Nauki, 46, Kiev-28, 03028 Kiev, Ukraine |
| Abstract: | Linear spectral properties, including excitation anisotropy, of pseudoisocyanine or 1,1′-diethyl-2,2′-cyanine iodide (PIC) J-aggregates in aqueous solutions with J-band position at 573 nm were investigated. Two-photon absorption of PIC J-aggregates and monomer molecules was studied using an open aperture Z-scan technique. A strong enhancement of the two-photon absorption cross-section of PIC in the supramolecular J-aggregate assembly was observed in aqueous solution. This enhancement is attributed to a strong coupling of the molecular transition dipoles. No two-photon absorption at the peak of the J-band was detected. |
| Keywords: | PIC J-aggregates Two-photon absorption Excitation anisotropy |
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