Open AccessPolariton-assisted splitting of broadband emission spectra of strongly coupled organic dye excitons in tunable optical microcavity
Author(s) -
Dmitriy Dovzhenko,
Konstantin Mochalov,
Ivan Vaskan,
Irina Kryukova,
Yury P. Rakovich,
Igor Nabiev
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.004077
Subject(s) - polariton , optical microcavity , photoluminescence , resonance (particle physics) , optoelectronics , excited state , exciton , materials science , spontaneous emission , dipole , coupling (piping) , spectral line , purcell effect , optics , molecular physics , physics , atomic physics , laser , condensed matter physics , quantum mechanics , astronomy , metallurgy
Resonance interaction between a localized electromagnetic field and excited states in molecules paves the way to control fundamental properties of a matter. In this study, we encapsulated organic molecules with relatively low unoriented dipole moments in the polymer matrix, placed them in tunable optical microcavity and realized, for the first time, controllable modification of the broad photoluminescence (PL) emission of these molecules in strong coupling regime at room temperature. Notably, while in most previous studies it was reported that the single mode dominates in the PL signal (radiation of the so-called branch of the lower polariton), here we report on the observation of two distinct PL peaks, evolution of which has been followed as the microcavity mode is detuned from the excitonic resonance. A significant Rabi splitting estimated from the modified PL spectra was as large as 225 meV. The developed approach can be used both in fundamental research of resonant light-mater coupling and its practical applications in sensing and development of coherent spontaneous emission sources using a combination of carefully designed microcavity with a wide variety of organic molecules.