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

Purely organic materials with negative and near-zero dielectric permittivitycan be easily fabricated, and propagation of surface polaritons at thematerial/air interface was demonstrated. Here we develop a mean-field theory oflight-induced optical properties of photonic organic materials taking thecollective effects into account. The theory describes both a red shift of theresonance frequency of isolated molecules, according to the Clausius-MossottiLorentz-Lorentz mechanism, and the wide variations of their spectra related tothe aggregation of molecules into J- or H-aggregates. We show that theexperimental absorption spectra of H-aggregates may be correctly described onlyif one takes both mechanisms into account. The bistable response of organicmaterials in the condensed phase has been demonstrated using theelectron-vibrational model. We show that using molecules with long-livingtriplet state T1 near excited singlet state S1, and fast intersystem crossingS1->T1 enables us to diminish CW light intensity needed for observingbistability below the damage threshold of thin organic films.

Mean-field electron-vibrational theory of collective effects in photonic organic materials: bistability