Plasmonically enhanced hybrid metalorganic random laser in eggshell biomembrane
| Autor: | Carlos Rojas-Ulloa, Nikifor Rakov Gomez, Leonardo de S. Menezes, Pablo I. R. Pincheira, Juliana Mikaelly Dias Soares, Helinando P. de Oliveira, Anderson S. L. Gomes |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Active laser medium 02 engineering and technology 010402 general chemistry 01 natural sciences Silver nanoparticle Inorganic Chemistry Rhodamine 6G chemistry.chemical_compound Laser linewidth Electrical and Electronic Engineering Physical and Theoretical Chemistry Spectroscopy Plasmon Random laser business.industry Scattering Organic Chemistry 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Optoelectronics 0210 nano-technology business Lasing threshold |
| Zdroj: | Optical Materials. 91:205-211 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2019.03.025 |
| Popis: | Plasmonically enhanced random lasing in eggshell biomembranes is reported using a hybrid metalorganic system comprised by Rhodamine 6G as gain medium and silver nanoparticles as the plasmonic metal. The scattering mechanism responsible for feedback in the random laser action arises from the submicron randomly arranged structure of the eggshell biomembrane. The measured spectral narrowing in the biomembranes without Ag is of the same order as of the Ag-infiltrated biomembrane, showing an emission linewidth reduction from ∼45 ± 2 nm below threshold to ∼5.0 ± 0.5 nm above threshold. On the other hand, the effect of the plasmon enhancement is clearly seen in the emitted random laser intensity, which is more efficient and with a lower threshold in the presence of the Ag nanoparticles. We also investigated the spatial behavior of the random laser emission, which shows hot spots with higher intensity in the presence of the Ag nanoparticles, arising from the plasmonic enhancement. |
| Databáze: | OpenAIRE |
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