Diode-Pumped Organo-Lead Halide Perovskite Lasing in a Metal-Clad Distributed Feedback Resonator

TLDR

Organic–inorganic lead halide perovskite semiconductors have recently reignited the prospect of a tunable, solution‑processed diode laser, which could impact a wide range of optoelectronic applications. The study demonstrates a metal‑clad, second‑order distributed feedback methylammonium lead iodide perovskite laser as a significant step toward realizing such tunable, solution‑processed diode lasers. The authors attribute the limited lasing duration to a photoinduced structural change in the perovskite that reduces gain on a sub‑microsecond timescale, rather than thermal runaway. The device lases above a 5 kW cm⁻² threshold for ~25 ns at >2 MHz, and the observed sub‑microsecond decay suggests a photoinduced structural change limits continuous operation, indicating the architecture could support electrically pumped lasing with J_th < 5 kA cm⁻² under sub‑20 ns pulsed drive.

Abstract

Organic–inorganic lead halide perovskite semiconductors have recently reignited the prospect of a tunable, solution-processed diode laser, which has the potential to impact a wide range of optoelectronic applications. Here, we demonstrate a metal-clad, second-order distributed feedback methylammonium lead iodide perovskite laser that marks a significant step toward this goal. Optically pumping this device with an InGaN diode laser at low temperature, we achieve lasing above a threshold pump intensity of 5 kW/cm2 for durations up to ∼25 ns at repetition rates exceeding 2 MHz. We show that the lasing duration is not limited by thermal runaway and propose instead that lasing ceases under continuous pumping due to a photoinduced structural change in the perovskite that reduces the gain on a submicrosecond time scale. Our results indicate that the architecture demonstrated here could provide the foundation for electrically pumped lasing with a threshold current density Jth < 5 kA/cm2 under sub-20 ns pulsed drive.