  Exciton-polaritons (EP), half-light half-matter quasiparticles that form in
optical cavities, are attractive platforms for creating macroscopic coherent
states like BECs. EPs based on organic molecules are of particular interest for
realizing such states at room temperature while offering the promise of
synthetic tunability. However, the demonstrations of such condensates have been
limited to a few specific molecular systems1. Here we report a universal
platform for realizing molecular polariton condensates using commercial dyes
that solves long standing material challenges. This solution is made possible
using a new and programable molecular material called small-molecule, ionic
isolation lattices (SMILES) with the potential to incorporate a wide array of
molecular fluorophores2. We show EP condensation in rhodamine by incorporating
it into SMILES lattice placed in a planar microcavity. The SMILES approach
overcomes the major drawbacks of organic molecular photophysical systems such
as self-quenching, which sets the foundation for realizing practical
polaritonic devices operating at ambient temperatures covering wide spectral
range.
