Spatio-temporal lasing dynamics in a Lima\c{c}on-shaped microcavity

TL;DR

This paper experimentally investigates the complex spatio-temporal lasing dynamics in Limaçon-shaped microcavities, revealing oscillations and fluctuations that impact their potential as on-chip light sources.

Contribution

It provides the first detailed analysis of the dynamic processes and fluctuations in Limaçon-shaped microcavity lasers, highlighting their oscillatory behavior and spatiotemporal complexity.

Findings

Edge emission shows intensity fluctuations across spatial and temporal scales.

Dominant oscillation occurs between two output beams with nanosecond periods.

Multiple dynamic processes contribute to the observed fluctuations.

Abstract

Lima\c{c}on-shaped microdisk lasers are promising on-chip light sources with low lasing threshold and unidirectional output. We conduct an experimental study on the lasing dynamics of Lima\c{c}on-shaped semiconductor microcavities. The edge emission exhibits intensity fluctuations over a wide range of spatial and temporal scales. They result from multiple dynamic processes with different origins and occurring on different spatiotemporal scales. The dominant process is an alternate oscillation between two output beams with a period as short as a few nanoseconds.