Low-threshold Surface-emitting Colloidal Quantum-dot Circular Bragg Laser Array
Author Information
Author(s): Tan Yangzhi, Huang Yitong, Wu Dan, Wang Yunjun, Sun Xiao Wei, Choi Hoi Wai, Wang Kai
Primary Institution: Southern University of Science and Technology, Shenzhen, China
Hypothesis
Can we achieve a low-threshold surface-emitting CQD laser array with high stability and integration density?
Conclusion
The developed CQD CBR laser exhibits a low lasing threshold of 17 μJ cm−2 and excellent stability over 1000 hours of operation.
Supporting Evidence
- The CQD CBR laser has a lasing threshold of 17 μJ cm−2, which is significantly lower than the 56 μJ cm−2 of the CQD VCSEL.
- The CQD CBR laser can operate continuously for over 1000 hours, equivalent to 3.63 × 10^8 pulses.
- The integration density of the CQD CBR laser array exceeds 2100 pixels per inch, the highest reported for surface-emitting CQD lasers.
Takeaway
Scientists created a new type of laser using tiny particles called quantum dots that can work really well and last a long time, making it useful for things like displays and sensors.
Methodology
The study involved developing high-quality CQD materials and integrating them into a circular Bragg resonator for laser applications.
Limitations
The study's findings may be limited by the specific conditions under which the lasers were tested and the potential for variations in CQD quality.
Digital Object Identifier (DOI)
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