Unveiling the underlying spin mechanism in quasi-2D perovskite spin-polarized lasing
- 1School of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China.
- 2State Key Laboratory of Ultra-intense laser Science and Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China.
- 3Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Hubei 430074, China.
Abstract
Spin-polarized lasers hold great potential in integrated photonic devices for secure communication, optical interconnections, and advanced optical devices, offering excellent properties superior to those of conventional lasers. Quasi-two-dimensional (quasi-2D) perovskites are promising candidates for spin-polarized lasers, because their potential structural inversion asymmetry will result in strong spin-orbit coupling (SOC) facilitating spin injection and hence spin splitting of electronic bands. However, strong SOC involves a trade-off between spin injection and spin lifetimes. How to prolong spin lifetimes in the lasing regime while maintaining the optical gain make it challenging to sustain spin polarization for lasing. Here, we unveil the underlying spin mechanism and successfully realize quasi-2D perovskite spin-polarized lasing by suppressing fast spin relaxation through triplet exciton regulation using organic cations of phenylethylammonium (PEA) and 1-naphthylmethylamine (NMA). We identify the Bir-Aronov-Pikus (BAP) mechanism is the dominant spin relaxation mechanism preventing the achievement of spin-polarized lasing in quasi-2D perovskites. By modulating the reverse intersystem crossing of triplet excitons, the D’yakonov-Perel’ (DP) mechanism becomes to play a key role and results in a new-emerged prolonged spin lifetime of 35.4 ps at 77 K, which is ∼5 times that of the BAP-induced one. Consequently, spin-polarized lasing is realized below 200 K, and the threshold is 30.2% lower than that for linearly polarized excitation. This work underscores the potential of PEA-based quasi-2D perovskites in spin-polarized lasing and contributes to the rapid advancements in perovskite spintronic devices.
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BibTeX
@article{li2026unveiling,
title = {{Unveiling the underlying spin mechanism in quasi-2D perovskite spin-polarized lasing}},
author = {Qian Li and Zhiping Hu and Hongzhi Zhou and Zhengzheng Liu and Sihao Huang and Hao Wang and Zijun Zhan and Baihui Nie and Zeyu Zhang and Jiajun Luo and Yuxin Leng and Juan Du},
journal = {Science Advances},
year = {2026},
month = nov,
doi = {10.1126/sciadv.aeg4834},
url = {https://www.science.org/doi/abs/10.1126/sciadv.aeg4834},
note = {CC BY-NC 4.0},
}
RIS
TY - JOUR
TI - Unveiling the underlying spin mechanism in quasi-2D perovskite spin-polarized lasing
AU - Qian Li
AU - Zhiping Hu
AU - Hongzhi Zhou
AU - Zhengzheng Liu
AU - Sihao Huang
AU - Hao Wang
AU - Zijun Zhan
AU - Baihui Nie
AU - Zeyu Zhang
AU - Jiajun Luo
AU - Yuxin Leng
AU - Juan Du
PY - 2026
DA - 2026/11/04
JO - Science Advances
DO - 10.1126/sciadv.aeg4834
UR - https://www.science.org/doi/abs/10.1126/sciadv.aeg4834
AB - Spin-polarized lasers hold great potential in integrated photonic devices for secure communication, optical interconnections, and advanced optical devices, offering excellent properties superior to those of conventional lasers. Quasi-two-dimensional (quasi-2D) perovskites are promising candidates for spin-polarized lasers, because their potential structural inversion asymmetry will result in strong spin-orbit coupling (SOC) facilitating spin injection and hence spin splitting of electronic bands. However, strong SOC involves a trade-off between spin injection and spin lifetimes. How to prolong spin lifetimes in the lasing regime while maintaining the optical gain make it challenging to sustain spin polarization for lasing. Here, we unveil the underlying spin mechanism and successfully realize quasi-2D perovskite spin-polarized lasing by suppressing fast spin relaxation through triplet exciton regulation using organic cations of phenylethylammonium (PEA) and 1-naphthylmethylamine (NMA). We identify the Bir-Aronov-Pikus (BAP) mechanism is the dominant spin relaxation mechanism preventing the achievement of spin-polarized lasing in quasi-2D perovskites. By modulating the reverse intersystem crossing of triplet excitons, the D’yakonov-Perel’ (DP) mechanism becomes to play a key role and results in a new-emerged prolonged spin lifetime of 35.4 ps at 77 K, which is ∼5 times that of the BAP-induced one. Consequently, spin-polarized lasing is realized below 200 K, and the threshold is 30.2% lower than that for linearly polarized excitation. This work underscores the potential of PEA-based quasi-2D perovskites in spin-polarized lasing and contributes to the rapid advancements in perovskite spintronic devices.
SN - 2375-2548
ER -