Plasmon-enhanced exciton relocalization in quasi-2D perovskites for low-threshold room-temperature plasmonic lasing
Journal
Science Advances
Journal Volume
11
Journal Issue
19
ISSN
2375-2548
Date Issued
2025-05-09
Author(s)
Wang, Yen-Yu
Lee, Xing-Hao
Chen, Chiung-Han
Yuan, Linchyn
Lai, Yin-Ti
Peng, Tzu-Yu
Chen, Jia-Wern
Lu, Yu-Jung
Abstract
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–two-dimensional (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 Ruddlesden-Popper perovskites with additives, substantially enhancing optical gain and improving stability. When coupled with a waveguide-hybridized surface lattice resonance mode, the enhanced light-matter interaction facilitates single-mode lasing with a notably low threshold of 0.9 millijoules per square centimeter. In addition, the device achieves robust lasing performance with extended operational stability (1.8 × 106 excitation pulses). These results provide a scalable, low-cost, and energy-efficient platform for nanolasing, with potential applications in next-generation photonic technologies, including light detection and ranging, sensing, optical communication, and computation.
SDGs
Publisher
American Association for the Advancement of Science (AAAS)
Type
journal article