title: Exploring the role of phase modulation on photoluminescence yield.
abstract: We report an investigation to elucidate the mechanisms of control in phase-sensitive experiments in two molecular systems. A first inspection of optimization procedures yields the same experimental result: increase in the emission efficiency upon excitation by a phase modulated pulse in a two-photon transition. More detailed studies, which include power dependence, spectral response, one and two color pump-probe and pump-pump experiments show that while for one chromophore phase modulation leads to spectral matching between the two-photon cross section and the second order power spectrum for the other it provides a tool to manipulate the wavepacket dynamics in the excited state.
authors.affiliation: Department of Chemistry, Chemical Physics Center, University of Florida, Gainesville, Florida, USA.
authors.forename: D G
authors.initials: DG
authors.lastname: Kuroda
authors.forename: C P
authors.initials: CP
authors.lastname: Singh
authors.forename: Z
authors.initials: Z
authors.lastname: Peng
authors.forename: V D
authors.initials: VD
authors.lastname: Kleiman
mesh_terms: D050091:Dendrimers / Q000737:chemistry; D049449:Luminescence; D017785:Photons; D011789:Quantum Theory; D012235:Rhodamines / Q000737:chemistry*
chemical_list: D050091:Dendrimers; D012235:Rhodamines; C026188:rhodamine 6G