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Highly Controllable Etchless Perovskite Microlasers Based on Bound States in the Continuum.
Yuhan Wang1, Yubin Fan1, Xudong Zhang1
1Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, People's Republic of China.
ACS Nano
|March 17, 2021
Summary
Researchers developed a new method for creating highly controlled perovskite microlasers. This technique utilizes symmetry-protected bound states in the continuum (BICs) to achieve single-mode lasing without damaging the material.
Area of Science:
- Materials Science
- Optics and Photonics
- Nanotechnology
Background:
- Lead halide perovskites are promising for lasing applications.
- Existing perovskite microlasers have limitations in mode control due to random morphology or performance-degrading etching processes.
Purpose of the Study:
- To propose and demonstrate a robust, generic mechanism for well-controlled perovskite microlasers.
- To achieve lasing without destructive etching processes.
- To explore the use of symmetry-protected bound states in the continuum (BICs) for microlaser fabrication.
Main Methods:
- Patterning a one-dimensional polymer grating onto a perovskite film.
- Utilizing the formation of symmetry-protected bound states in the continuum (BICs).
- Leveraging the high Q factor and mode profile of BICs combined with perovskite gain.
Main Results:
- Demonstrated single-mode perovskite microlasers with high repeatability and controllability.
- Achieved lasers with excellent directionality and a unique polarization vortex.
- Showcased the potential for extending the mechanism to 2D nanostructures for lasers with various topological charges.
Conclusions:
- A novel, non-etching method for fabricating controlled perovskite microlasers using BICs has been successfully demonstrated.
- This approach overcomes limitations of previous methods, enabling high-performance and integrable microlaser devices.
- The mechanism offers a versatile platform for developing advanced perovskite-based photonic devices.
