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Self-trapping of excitons, violation of condon approximation, and efficient fluorescence in conjugated cycloparaphenylenes
(American Chemical Society, 2014-11)
Cycloparaphenylenes, the simplest structural unit of armchair carbon nanotubes, have unique optoelectronic properties counterintuitive in the class of conjugated organic materials. Our time-dependent density functional ...
Coherent exciton-vibrational dynamics and energy transfer in conjugated organics
(Nature Publishing Group, 2018-12)
Coherence, signifying concurrent electron-vibrational dynamics in complex natural and man-made systems, is currently a subject of intense study. Understanding this phenomenon is important when designing carrier transport ...
Electrically Driven Microcavity Exciton-Polariton Optomechanics at 20 GHz ELECTRICALLY DRIVEN MICROCAVITY EXCITON-POLARITON ... KUZNETSOV et al.
(2021-04-01)
Microcavity exciton polaritons enable the resonant coupling of excitons and photons to vibrations in the super-high-frequency (SHF, 3-30 GHz) domain. We introduce here a novel platform for coherent SHF optomechanics based ...
Excitation Energy Transfer between bodipy Dyes in a Symmetric Molecular Excitonic Seesaw
(American Chemical Society, 2021-09)
We examine the redistribution of energy between electronic and vibrational degrees of freedom that takes place between a π-conjugated oligomer, a phenylene-butadiynylene, and two identical boron-dipyrromethene (bodipy) ...
Electronic Delocalization, Vibrational Dynamics, and Energy Transfer in Organic Chromophores
(American Chemical Society, 2017-06)
The efficiency of materials developed for solar energy and technological applications depends on the interplay between molecular architecture and light-induced electronic energy redistribution. The spatial localization of ...
Energy transfer and spatial scrambling of an exciton in a conjugated dendrimer
(Royal Society of Chemistry, 2018-11)
Photoexcitation of multichromophoric light harvesting molecules induces a number of intramolecular electronic energy relaxation and redistribution pathways that can ultimately lead to ultrafast exciton self-trapping on a ...
High magnetic field detunes vibronic resonances in photosynthetic light harvesting
(American Chemical Society, 2018-09)
The origin and role of oscillatory features detected in recent femtosecond spectroscopy experiments of photosynthetic complexes remain elusive. A key hypothesis underneath of these observations relies on electronic-vibrational ...
Estudo de propriedades estruturais, ópticas e químicas de nanoestruturas semicondutoras de GaAs
(Universidade Federal de Minas GeraisBrasilICX - DEPARTAMENTO DE FÍSICAPrograma de Pós-Graduação em FísicaUFMG, 2021-08-24)
Gallium arsenide is widely studied by the scientific community, its crystalline cubic phase
presents characteristics which are well established in the literature. However, when this
compound is grown in nanometric ...
Electron-phonon scattering effects on electronic and optical properties of orthorhombic GeS
(2016-10-19)
Group-VI monochalcogenides are attracting a great deal of attention due to their peculiar anisotropic properties. Very recently, it has been suggested that GeS could act as a promissory absorbing material with high ...
Photoinduced dynamics in cycloparaphenylenes: planarization, electron-phonon coupling, localization and intra-ring migration of the electronic excitation.
(Royal Society of Chemistry, 2017-11)
Cycloparaphenylenes represent the smallest possible fragments of armchair carbon nanotubes. Due to their cyclic and curved conjugation, these nanohoops own unique photophysical properties. Herein, the internal conversion ...