Multiple-pulse lasing from an optically induced harmonic confinement in a highly photoexcited microcavity

TL;DR

This paper demonstrates room-temperature harmonic states in a photoexcited microcavity, revealing sequential multiple pulsed lasing with distinct angles and frequencies due to optically induced confinement.

Contribution

It introduces a method to generate and observe harmonic states in a microcavity via optical modulation, a novel approach at room temperature.

Findings

Harmonic states observed at quantized energies up to 4 meV.

Sequential multiple pulsed lasing with different angles and frequencies.

Harmonic states visualized in a micrometer-scale optical potential.

Abstract

We report the observation of macroscopic harmonic states in an optically induced confinement in a highly photoexcited semiconductor microcavity at room temperature. The spatially photomodulated refractive index changes result in the visualization of harmonic states in a micrometer-scale optical potential at quantized energies up to 4 meV even in the weak-coupling plasma limit. We characterize the time evolution of the harmonic states directly from the consequent pulse radiation and identify sequential multiple $\sim$10 ps pulse lasing with different emitting angles and frequencies.