Nano-second exciton-polariton lasing in organic microcavities

TL;DR

This study demonstrates nano-second scale exciton-polariton lasing in organic microcavities using long excitation pulses, revealing potential for ambient polaritonics despite short polariton lifetimes.

Contribution

It introduces a single-shot dispersion imaging technique with nanosecond pulses to observe long-lived polariton lasing in organic microcavities, advancing understanding of organic polariton dynamics.

Findings

Achieved 1.2 ns long-lived polariton lasing

Observed superlinear increase in photoluminescence

Detected spectral line-narrowing and energy blueshift

Abstract

Organic semiconductors are a promising platform for ambient polaritonics. Several applications, such as polariton routers, and many-body condensed matter phenomena are currently hindered due to the ultra-short polariton lifetimes in organics. Here, we employ a single-shot dispersion imaging technique, using 4 nanosecond long non-resonant excitation pulses, to study polariton lasing in a $\lambda/2$ planar organic microcavity filled with BODIPY-Br dye molecules. At a power threshold density of $1.5 MW/cm^{2}$, we observe the transition to a quasi-steady state, 1.2 ns long-lived, single-mode polariton lasing and the concomitant superlinear increase of photoluminescence, spectral line-narrowing, and energy blueshift