Abstract
We report on reversible all-optical emission control and lasing in plasmonic nanoparticle lattices. By incorporating photochromic molecules into the liquid gain medium composed of organic fluorescent molecules, we realize all-optical control over gain and absorption, the two key parameters associated with both conventional and nanoscale lasing. We demonstrate reversible photoswitching between two distinct modes of operation: (1) spontaneous emission to the lattice mode, characterized by broad emission line width, low emission intensity, and large angular distribution; and (2) lasing action, characterized by very narrow (sub-nm) line widths due to the emergence of increased gain and temporal coherence in the system, approximately 3 orders of magnitude increase in emission intensity, and narrow 0.7° angular divergence of the beam. A rate-equation model is employed to describe the operation of the switchable plasmonic laser. Our results provide the first demonstration of optically tunable losses in plasmonic lattice lasers, which is an important milestone for the development of active plasmonics and paves the way for ultrafast all-optical switching of plasmonic nanolasers.
| Original language | English |
|---|---|
| Pages (from-to) | 2850-2858 |
| Number of pages | 9 |
| Journal | ACS Photonics |
| Volume | 7 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2020 |
| Publication type | A1 Journal article-refereed |
Funding
This work is part of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decisions 320165, 320166, and 320167. This work was supported by the Academy of Finland under project numbers 322002, 303351, 307419, 327293, 324353, 318987 (QuantERA project RouTe), and 318937 (PROFI), by Centre for Quantum Engineering (CQE) at Aalto University, and by the European Research Council (Starting Grant Project PHOTOTUNE, decision number 679646). Part of the research was performed at the Micronova Nanofabrication Centre, supported by Aalto University. A.J.M. acknowledges financial support by the Jenny and Antti Wihuri Foundation.
Keywords
- Nanolasing
- Optical control
- Photoswitching
- Plasmonics
- Surface lattice resonance
Publication forum classification
- Publication forum level 2
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biotechnology
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
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