Evidence for a Polariton-Mediated Biexciton Transition in Single-Walled Carbon Nanotubes.

ABSTRACT: Strong coupling of excitonic resonances with a cavity gives rise to exciton-polaritons which possess a modified energy landscape compared to the uncoupled emitter. However, due to the femtosecond lifetime of the so-called bright polariton states and transient changes of the cavity reflectivity under excitation, it is challenging to directly measure the polariton excited state dynamics. Here, near-infrared pump-probe spectroscopy is used to investigate the ultrafast dynamics of exciton-polaritons based on strongly coupled (6,5) single-walled carbon nanotubes in metal-clad microcavities. We present a protocol for fitting the reflectivity-associated response of the cavity using genetic algorithm-assisted transfer-matrix simulations. With this approach, we are able to identify an absorptive ex

SUBMITTER: Luttgens JM 

PROVIDER: S-EPMC9121424 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature