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High-Density and Uniform Lead Halide Perovskite Nanolaser Array on Silicon
Kaiyang Wang1, Zhiyuan Gu1, Shuai Liu1
1National Key Laboratory on Tunable Laser Technology, Department of Electrical and Information Engineering and ‡Department of Material Science and Engineering, Harbin Institute of Technology , Shenzhen 518055, China.
The Journal of Physical Chemistry Letters
|June 21, 2016
Summary
Researchers created high-density, uniform lead halide perovskite nanolaser arrays on silicon. This method utilizes a silicon grating to segment a perovskite microwire, enabling efficient laser emission with consistent wavelengths.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Achieving high-density, uniform nanolaser arrays using lead halide perovskites, particularly on silicon substrates, presents significant fabrication challenges.
- Existing methods struggle to control the uniformity of lasing wavelengths and the density of nanolasers in perovskite-based systems.
Purpose of the Study:
- To demonstrate a straightforward method for fabricating high-density and uniformly lasing lead halide perovskite nanolaser arrays on silicon chips.
- To enhance the integration of perovskite nanolasers with silicon photonics for advanced optoelectronic applications.
Main Methods:
- A perovskite microwire was strategically positioned onto a silicon grating structure.
- The silicon grating acted as a template, periodically segmenting the microwire.
- Laser emission was analyzed from the suspended portions of the microwire exhibiting high-quality (Q) resonances.
Main Results:
- The periodic segmentation by the silicon grating successfully divided transverse laser emissions into a periodic nanolaser array.
- Nanolasers exhibited highly uniform lasing wavelengths across different segments of the array.
- Transverse lasing was observed in air gaps as narrow as 420 nm, achieving a nanolaser density of approximately 1250 per millimeter.
Conclusions:
- This research presents a viable and simple approach for creating dense, wavelength-uniform perovskite nanolaser arrays on silicon.
- The findings pave the way for the development of advanced perovskite microlaser and nanolaser arrays for integrated silicon photonics.
- The demonstrated technique holds promise for future applications in optical communication, sensing, and computing.
