Eisfeld<i>et al.</i>Reply:

Eisfeld, Alexander; Vlaming, S. M.; Möbius, S.; Малышев, В. А.; Knoester, Jasper

doi:10.1103/physrevlett.109.259702

Cited by 14 publications

(33 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We will comment on this extension at the appropriate places. We consider uncorrelated diagonal disorder, 37 that is, the molecular transition energies E n are independently taken from a certain distribution. In this work, we focus on the symmetric (Lévy) stable distributions,…”

Section: A Hamiltonian and Localizationmentioning

confidence: 99%

“…36 During the past 20 years, it has been recognized that Lévy statistics are relevant in a variety of subfields of the natural sciences, ranging from statistical physics to optics, plasma physics, and condensed matter physics. [37][38][39][40][41][42][43][44][45] In this paper, we study the transport properties of a one-dimensional Frenkel exciton chain of N coupled chromophores with transition energies randomly taken from a symmetric Lévy stable distribution. As has been shown in our previous publication, 37 this choice can lead to significant qualitative changes in the absorption spectra (exchange broadening and blue shift of the maximum instead of exchange narrowing and red shift found for Gaussian randomness) as well as on the localization properties of the model (additional structure in the localization length distribution).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Subdiffusive exciton motion in systems with heavy-tailed disorder

Vlaming

Малышев

Eisfeld

et al. 2013

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

We study the transport of collective excitations (Frenkel excitons) in systems with static disorder in the transition energies, not limiting ourselves to Gaussian transition energy distributions. Instead, we generalize this model to the wider class of Lévy stable distributions, characterized by heavy tails. Phonon-assisted scattering of excitons, localized by the disorder, leads to thermally activated exciton motion. The time evolution of the second moment of the exciton distribution is shown to be sublinear, thus indicating that the exciton dynamics in such systems is not diffusive, but rather subdiffusive instead. The heavier the tail in the transition energy distribution is, the larger are the deviations from the diffusive regime. This from fluctuations of site energies larger than the exciton band width (outliers). We show that the occurrence of subdiffusive transport for heavy-tailed disorder distributions can be understood from the scattering rate distributions, which possess a (second) peak at zero scattering rate.

show abstract

Section: A Hamiltonian and Localizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Subdiffusive exciton motion in systems with heavy-tailed disorder

Vlaming

Малышев

Eisfeld

et al. 2013

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The optical properties of organic molecules in 3D crystals, thin films, and in the solution phase has been studied for many decades [1][2][3][4][5] , but it remains difficult to predict the influence of environment on fluorescence and absorption. One area of particular interest is the coupling of transition dipole moments of neighbouring molecules resulting in the formation of H-and J-aggregates which can, respectively, suppress or enhance fluorescence with accompanying blue/red spectral shifts, and also offers the prospect of a molecular implementation of super-radiance and related quantum optical effects 4,[6][7][8][9][10] . Recently a new approach to investigating the coupling of transition dipole moments has emerged through the study of molecules on a surface using a combination of scanning probe microscopy, which provides precise information about the relative position of neighbouring molecules, and fluorescence spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers

Kerfoot

Korolkov

Nizovtsev

et al. 2018

The Journal of Chemical Physics

View full text Add to dashboard Cite

We have investigated the influence of the substrate on the fluorescence of adsorbed organic molecules. Monolayer films of perylene-3,4,9,10-tetracarboxylic-3,4,9,10-diimide (PTCDI), a supramolecular network formed from PTCDI and melamine, and perylene-3,4,9,10-tetracarboxylic-3,4,9,10-dianhydride have been deposited on hexagonal boron nitride (hBN). The principal peaks in the fluorescence spectra of these films were red-shifted by up to 0.37 eV relative to published measurements for molecules in helium droplets. Smaller shifts (∼0.03 eV) arising from interactions between neighbouring molecules are investigated by comparing the fluorescence of distinct arrangements of PTCDI, which are templated by supramolecular self-assembly and determined with molecular resolution using atomic force microscopy under ambient conditions. We compare our experimental results with red-shifts calculated using a combination of a perturbative model and density functional theory which account for, respectively, resonant and non-resonant effects of a dielectric hBN substrate. We show that the substrate gives rise to a red-shift in the fluorescence of an adsorbed molecule and also screens the interactions between neighbouring transition dipole moments; both these effects depend on the refractive index of the substrate.

show abstract

“…However, as can clearly be seen, this is no longer the case for the spectra including coupling to the vibrations. Although, in accordance with sum rules [19,29,24], the mean of each absorption spectrum is centered at the mean of the corresponding purely electronic spectrum, the line-shape is completely different for negative and positive interaction V .…”

Section: Resultsmentioning

confidence: 53%

Spectral Properties of Molecular Oligomers: A Non-Markovian Quantum State Diffusion Approach

Roden

Strunz

Eisfeld

2011

Condensed Matter Theories

View full text Add to dashboard Cite

Absorption spectra of small molecular aggregates (oligomers) are considered. The dipole-dipole interaction between the monomers leads to shifts of the oligomer spectra with respect to the monomer absorption. The line-shapes of monomer as well as oligomer absorption depend strongly on the coupling to vibrational modes. Using a recently developed approach [Roden et. al, PRL 103, 058301] we investigate the length dependence of spectra of one-dimensional aggregates for various values of the interaction strength between the monomers. It is demonstrated, that the present approach is well suited to describe the occurrence of the J-and H-bands.

show abstract

Eisfeldet al.Reply:

Cited by 14 publications

References 3 publications

Subdiffusive exciton motion in systems with heavy-tailed disorder

Subdiffusive exciton motion in systems with heavy-tailed disorder

Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers

Spectral Properties of Molecular Oligomers: A Non-Markovian Quantum State Diffusion Approach

Contact Info

Product

Resources

About