Puchert, Robin P. and Steiner, Florian and Plechinger, Gerd and Hofmann, Felix J. and Caspers, Ines and Kirschner, Johanna and Nagler, Philipp and Chernikov, Alexey and Schueller, Christian and Korn, Tobias and Vogelsang, Jan and Bange, Sebastian and Lupton, John M. (2017) Spectral focusing of broadband silver electroluminescence in nanoscopic FRET-LEDs. NATURE NANOTECHNOLOGY, 12 (7). 637-+. ISSN 1748-3387, 1748-3395
Full text not available from this repository. (Request a copy)Abstract
Few inventions have shaped the world like the incandescent bulb. Edison used thermal radiation from ohmically heated conductors, but some noble metals also exhibit 'cold' electroluminescence in percolation films(1,2), tunnel diodes(3), electromigrated nanoparticle aggregates(4,5), optical antennas(6) or scanning tunnelling microscopy(7-9). The origin of this radiation, which is spectrally broad and depends on applied bias, is controversial given the low radiative yields of electronic transitions. Nanoparticle electroluminescence is particularly intriguing because it involves localized surface-plasmon resonances with large dipole moments. Such plasmons enable very efficient non-radiative fluorescence resonance energy transfer (FRET) coupling to proximal resonant dipole transitions. Here, we demonstrate nanoscopic FRET-light-emitting diodes which exploit the opposite process, energy transfer from silver nanoparticles to exfoliated monolayers of transition-metal dichalcogenides(10). In diffraction-limited hotspots showing pronounced photon bunching, broadband silver electroluminescence is focused into the narrow excitonic resonance of the atomically thin overlayer. Such devices may offer alternatives to conventional nano-light-emitting diodes(11) in on-chip optical interconnects.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING-TUNNELING-MICROSCOPE; ENERGY-TRANSFER; LIGHT-EMISSION; PHOTON-EMISSION; MONOLAYER WSE2; LAYER MOS2; SINGLE; NANOCRYSTALS; DEVICES; DIODES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:16 |
| Last Modified: | 25 Feb 2019 14:28 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1614 |
Actions (login required)
 |
View Item |
