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Spatiotemporal lasing dynamics in a Limaçon-shaped microcavity.

Kyungduk Kim, Stefan Bittner, Yuhao Jin

|February 1, 2023

Summary

Limaçon microdisk lasers show complex lasing dynamics. An alternating oscillation between two output beams, occurring within nanoseconds, is the dominant process observed in these semiconductor devices.

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Area of Science:

Optics and Photonics
Semiconductor Devices
Laser Physics

Background:

Limaçon-shaped microdisk lasers offer low thresholds and unidirectional output, making them attractive for on-chip light sources.
Understanding the lasing dynamics is crucial for optimizing their performance and stability.

Purpose of the Study:

To experimentally investigate the complex lasing dynamics of Limaçon-shaped semiconductor microcavities.
To identify and characterize the spatiotemporal dynamics of edge emission in these microdisk lasers.

Main Methods:

Experimental study of lasing dynamics in Limaçon-shaped semiconductor microcavities.
Analysis of edge emission intensity fluctuations across various spatial and temporal scales.

Main Results:

Edge emission exhibits intensity fluctuations across a wide range of spatial and temporal scales.
Multiple dynamic processes contribute to these fluctuations, originating from different physical mechanisms.
A dominant process involves alternate oscillation between two output beams with a period as short as a few nanoseconds.

Conclusions:

The lasing dynamics of Limaçon microdisk lasers are complex, driven by multiple underlying processes.
The observed nanosecond-scale alternate oscillation significantly influences the laser's output characteristics.
Further research into these dynamics can lead to improved design and application of on-chip light sources.