AI Article Synopsis
- The study examines the behavior of photonic crystal quantum dot lasers in a slow-light environment, revealing unique threshold gain characteristics compared to traditional lasers.
- It demonstrates that these lasers achieve a minimum threshold gain at a certain cavity length due to factors like slow light effects and random defects from manufacturing.
- Longer cavity lengths help these lasers operate more effectively in the slow-light regime, balancing reduced mirror losses against increased losses from disorder.
Article Abstract
The threshold properties of photonic crystal quantum dot lasers operating in the slow-light regime are investigated experimentally and theoretically. Measurements show that, in contrast to conventional lasers, the threshold gain attains a minimum value for a specific cavity length. The experimental results are explained by an analytical theory for the laser threshold that takes into account the effects of slow light and random disorder due to unavoidable fabrication imperfections. Longer lasers are found to operate deeper into the slow-light region, leading to a trade-off between slow-light induced reduction of the mirror loss and slow-light enhancement of disorder-induced losses.
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| http://dx.doi.org/10.1103/PhysRevLett.116.063901 | DOI Listing |
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