期刊
ACS PHOTONICS
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.2c00917
关键词
perovskite lasers; distributed feedback lasers; cavity fabrication; cavity engineering
类别
资金
- National Science Foundation DMREF Program (NSF) [1729383]
- UNC Research Opportunities Initiative Center for Hybrid Materials Enabled Electronic Technologies (CHMEET)
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1729383] Funding Source: National Science Foundation
Perovskite distributed feedback (DFB) lasers are attracting attention due to their solution processability, band gap tunability, single-mode operation, and low threshold. This study presents a facile approach to fabricate and design the cavities of perovskite surface-emitting DFB lasers. By adding polyvinylpyrrolidone into the perovskite precursor solutions, the cavity fabrication is simplified, and the effective index of the waveguide mode can be manipulated by varying the solution concentration. The fabricated perovskite DBF lasers achieved an optimized optical resonance and low threshold.
Perovskite distributed feedback (DFB) lasers are gaining increasing attention due to their solution processability, band gap tunability, single-mode operation, and low threshold. However, it is still challenging to fabricate high-quality DFB cavities on perovskite films, resulting in a mismatch between the optical resonance and the gain spectrum. To address these issues, here we develop a systematic facile approach to fabricate and design the cavities of perovskite surface-emitting DFB lasers. Using this approach, the cavity fabrication is simplified by adding polyvinylpyrrolidone into the perovskite precursor solutions, enabling a simple nanoimprint on perovskite films, while the cavity engineering is guided by a systematic optical mode analysis and conducted through simply varying the solution concentration to manipulate the effective index of the waveguide mode. With this methodology, we fabricated perovskite DBF lasers with an optimized optical resonance, whereby a low threshold of 20 mu J cm(-2) was achieved. Our approach provides an effective way to fabricate high-performance perovskite DFB lasers. With this technique, we can easily realize high-precision cavity tuning with a precision of better than 5 nm.
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