English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We demonstrate theoretically and experimentally that the nonlinearinteraction between excitations whose harmonic energies coincide gives rise toa strong coupling that opens a new coherent ultrafast energy relaxation path.Instead of an incoherent decay of excitations, that should take a finite timethat depends on the energy difference between the initial state and the finalstate, the nonlinear interaction allows their coherent superposition and thusan instantaneous transfer of the excitation over energies as large as theelectron-volt. Such a situation should be encountered in many systems. Wedemonstrate that such a model applies also for excitons in single-wall carbonnanotubes (SWCNT) where a strong nonlinear Coulomb interaction occurs between$\rm E_{11}$ and $\rm E_{22}$ states. This explains a wide panel ofobservations about optoelectronic properties of the SWCNT and gives a coherentpicture of their features like the exciton-line spectral positions, excitoncollisions and their ultrafast relaxation, as well as the low light-emissionefficiency of the nanotubes.

Nonlinear strong coupling between sub-band excitons: a new coherent path for ultrafast relaxation