Stabilizing room-temperature nanolasers with quasi-2D perovskites

Working in collaboration with Prof. Chu-Chen Chueh from National Taiwan University (NTU), Prof. Yu-Jung Lu and her collaborators demonstrated room-temperature plasmonic lasing by integrating quasi-two-dimensional (quasi-2D) perovskites with high-Q plasmonic nanostructures. A research team led by Prof. Yu-Jung Lu at the Research Center for Applied Sciences, Academia Sinica, recently published their findings in Science Advances.

Room-temperature nanolasers are crucial for advancing optical communication and photonic quantum technologies due to their capability to generate coherent light at a subwavelength scale.

However, their development is constrained by challenges such as insufficient gain, material instability, and high lasing thresholds. By integrating quasi-2D perovskites with high-Q plasmonic nanostructures, we demonstrate a stable, wavelength-tunable, single-mode laser operating at room temperature.

This device leverages a unique exciton relocalization effect in quasi-2D perovskites with additive, substantially enhancing optical gain and improving stability. When coupled with a waveguide-hybridized surface lattice resonance mode (W-SLR), the enhanced light-matter interaction facilitates single-mode lasing with a notably low threshold.

Additionally, the device achieves robust lasing performance with extended operational stability. These results provide a scalable, low-cost, and energy-efficient platform for nanolasing, with potential applications in next-generation photonic technologies, including LiDAR, sensing, optical communication, and computation.

The research was published in Science Advances on May 7, 2025, and was featured on the journal's homepage as a highlighted article. The first author is Yen-Yu Wang, a Ph.D. student of TIGP-Nano program at Academia Sinica. Xing-Hao Lee is listed as a co-first author and is currently affiliated with TSMC. The research was supported by Academia Sinica, the National Science and Technology Council, and NTU-AS Innovative Joint Program.

"After seven years of searching for the right materials and design, we finally see a solution. By precisely tailoring light-matter interaction at the nanoscale using thickness-controllable quasi-2D perovskites coupled with the high-Q plasmonic platform, we have realized stable room-temperature nanolasers." said Prof. Yu-Jung Lu.

More information:
Yen-Yu Wang et al, Plasmon-enhanced exciton relocalization in quasi-2D perovskites for low-threshold room-temperature plasmonic lasing, Science Advances (2025). DOI: 10.1126/sciadv.adu6824

Provided by National Taiwan University