Topic
Photoexcitation
About: Photoexcitation is a research topic. Over the lifetime, 5874 publications have been published within this topic receiving 134733 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the authors reported photocurrent and photoluminescence measurements on blends of the organometallic polymer Pt-poly-yne and C 60, and showed that triplet excitons with a binding energy of at least 0.8 eV are created after photoexcitation of Pt-Poly-Yen.
90 citations
TL;DR: In this article, the authors show that the phase transition of VO2 from a monoclinic insulator to a rutile metal, which occurs thermally at T C ǫ = 340 K, can also be driven by strong photoexcitation.
90 citations
TL;DR: In this article, a two photon process was reported in which benzene radical cation, C6H6+, photodissociates upon irradiation from an intense argon ion laser to produce predominantly C 6H5+ and H at photon energies significantly below thermodynamic threshold.
90 citations
TL;DR: The cyclization reaction of the photochromic diarylethene derivative 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)perfluorocyclopentene and a vibrational mode analysis using density functional theory to give some insight into the primary motions involved in the ring closing reaction are discussed.
Abstract: The cyclization reaction of the photochromic diarylethene derivative 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)perfluorocyclopentene was studied in its single crystal phase with femtosecond transient absorption spectroscopy. The transient absorption measurements were performed with a robust acquisition scheme that explicitly exploits the photoreversibility of the molecular system and monitors the reversibility conditions. The crystalline system demonstrated 3 × 104 repeatable cycles before significant degradation was observed. Immediately following photoexcitation, the excited state absorption associated with the open-ring conformation undergoes a large spectral shift with a time constant of approximately 200 fs. Following this evolution on the excited state potential energy surface, the ring closure occurs with a time constant of 5.3 ps, which is significantly slower than previously reported measurements for similar derivatives in the solution phase. Time resolved electron diffraction studies were used to ...
90 citations
TL;DR: In this article, the beam asymmetry and differential cross section for the reaction gamma+p->eta+p were measured from production threshold to 1500 MeV photon laboratory energy, and the two dominant neutral decay modes of the eta meson, eta->2g and eta-3pi0, were analyzed.
Abstract: Beam asymmetry and differential cross section for the reaction gamma+p->eta+p were measured from production threshold to 1500 MeV photon laboratory energy. The two dominant neutral decay modes of the eta meson, eta->2g and eta->3pi0, were analyzed. The full set of measurements is in good agreement with previously published results. Our data were compared with three models. They all fit satisfactorily the results but their respective resonance contributions are quite different. The possible photoexcitation of a narrow state N(1670) was investigated and no evidence was found.
90 citations