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Spatiotemporal lasing dynamics in a Limaçon-shaped microcavity.
Optics Letters
|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.
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.
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