Thermalization of Fluorescent Protein Exciton-Polaritons at Room Temperature.

ABSTRACT: Fluorescent proteins (FPs) have recently emerged as a serious contender for realizing ultralow threshold room temperature exciton-polariton condensation and lasing. This contribution investigates the thermalization of FP microcavity exciton-polaritons upon optical pumping under ambient conditions. Polariton cooling is realized using a new FP molecule, called mScarlet, coupled strongly to the optical modes in a Fabry-Pérot cavity. Interestingly, at the threshold excitation energy (fluence) of ≈9 nJ per pulse (15.6 mJ cm^-2 ), an effective temperature is observed, T_eff  ≈ 350 ± 35 K close to the lattice temperature indicative of strongly thermalized exciton-polaritons at equilibrium. This efficient thermalization results from the interplay of radiative pumping facilitate

SUBMITTER: Satapathy S 

PROVIDER: S-EPMC9022594 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature