Excitation and Momentum Resolved Multi-Polaritonic Emission Mapping in Organic-Inorganic Microcavity

Hybridization of an organic Frenkel exciton (layer-by-layer TDBC) and an inorganic Wannier-Mott exciton (WS₂ monolayer) results in the formation of a multi-polaritonic system. Such a hybrid platform offers an excellent way of engineering the emission through the coupled states. This article demonstrates the mapping of dispersion characteristics of multi-polaritonic emission using excitation and momentum resolved, Fourier-plane micro-spectroscopy. Further, the contribution of photon fractions is correlated to the emission of the polaritonic branches. For example, an increase in the photon fraction of the middle polaritonic state is observed at certain momenta in the Fourier space, thereby amplifying the emission population density. The competition between the middle and lower polaritonic states is tested at various cavity detuning conditions and found to be in accordance with the modeling. This work has potential implications and helps to design future-generation optoelectronic and photonic devices.