Inducing lasing in organic materials with low optical gain by three-dimensional plasmonic nanocavity arraysHan, C., Qi, Y., Wang, Y. & Ye, W., 22-Jul-2019, In : Optics Express. 27, 15, p. 20597-20607 11 p.
Research output: Contribution to journal › Article › Academic › peer-review
Lasing in organic media with very low gain has been pursued for a long time in optoelectronics. Here, we experimentally demonstrate that plasmonic lasing in the visible regime at room temperature can be achieved by hybridizing active media of very low optical gain such as ionic liquid and polymethylmethacrylate with three-dimensional (3D) plasmonic metamaterials. The 3D nanostructure consists of a double-layer N-shaped silver wire-hole array with strongly coupled multiple hot spots densely packed in each unit cell. These hot spots overlap perfectly with the gain media, allowing efficient gain-plasmon coupling in subwavelength volumes. The periodic arrangement of hot spots, as the metal and dielectric are distributed in an alternate manner along both transverse and vertical directions, results in ultrastrong suppression of scattering losses. In addition, the lasing characteristics, including threshold, intensity and polarization can be controlled by the lattice constant and geometry of metamaterials. Such a plasmonic nanolaser proves to be of low threshold and low gain requirement, providing an essential step towards easy-processing organic based optoelectronics. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
|Number of pages||11|
|Publication status||Published - 22-Jul-2019|
- AMPLIFIED SPONTANEOUS EMISSION, LASERS